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If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread:
CentOS2Alma discussion
Issue IMAP requires security certificate? Maybe?
- Thread starter marvin
- Start date
learning_curve
Silver Pleskian
Morning!
You've not stated where / what / how you've tested here, but, this ^ was covered previously i.e. How you have administered your own config / setup etc
Guessing that this one, might be an excerpt from a full report generated by an ssl check /test site ?
Same again (as above)
Obviously with sanitized domain names, nobody else can independently replicate what you appear to have tested and / or test / anything else, elsewhere, but it makes sense not to post your own hosted domain names, here on the forum.
One thing that was asked earlier, but which, by chance you appear to have now answered, was this question:
Post #12 > "...Just out of interest, is your plesk hosting domain, a different domain than the one that you're now having mail issues with?" (sic)
From what you've posted above, it appears that your server hosting domain is indeed, a different domain than the domain that you're having mail issues with now. That, again, sends you back to how you have administered your own config / setup etc because you've already stated that you have full root access.
You can check the two different SSL Certificates here: SSL Checker and include their correct port numbers e.g. 8443 and 443 and / or any others, that you might have specified / be using, but do remember, that whilst this can and will validate any SSL Certs that you are currently hosting c/w plenty of supporting data, there are many other check sites too, but, perhaps most important of all, is that you won't see there, which SSL cert you've actually 'made default' within Plesk, as you'll need to view that within Plesk - Post #7 above.
learning_curve
Silver Pleskian
If you're already hosting domains and sites for customers, then you really should already be aware, of exactly how to do this.
If all this is just for your own use, then yes there's plenty to experience and understand with Plesk, in order to get this setup & configured correctly.
In both cases (assuming now that you have not yet used Plesk long enough to have accumulated this knowledge) then the quickest and easiest option for you would be to place a Plesk support subscription, open support tickets, give Plesk secure access to your VPS and thus achieve what you want / need soonest.
Sometimes yes, it is. However, you've only posted ^ the summary (i.e. suggestion) not the data, that's actually specific to your own server / yourself (rightly so - see previous note about posting your own data in a forum etc) So.... it's extremely difficult for anybody on here, to determine if this applies to you 100% or not.
marvin
Basic Pleskian
marvin
Basic Pleskian
I’ll test SSL and see what I get.
Basically everything is ‘out of the box’ Plesk configuration. VPS certificate has always been there and I assigned separate Let’sEncrypt certificates to sites. Which worked fine. But something apparently broke on my domain (all others are ok) when certificate auto-renewed in May and renewing cert manually didn’t fix things.
Basically everything is ‘out of the box’ Plesk configuration. VPS certificate has always been there and I assigned separate Let’sEncrypt certificates to sites. Which worked fine. But something apparently broke on my domain (all others are ok) when certificate auto-renewed in May and renewing cert manually didn’t fix things.
learning_curve
Silver Pleskian
Okay, understood. Are you using your VPS / Plesk / Multi-Domain setup and providing a service for customers? Yes or No?
If you are, then you'll be well aware, that 'out of the box' is short of a multitude of config adjustments and setup changes so that you can do that effectively.
If you're not, then that ^ still applies, but, it would appear that you haven't had chance so make all of these config adjustments and setup changes - yet.
You didn't say where? You posted one of my previous messages that was sent after your test results, not before. So as a pure guess, it may have been at Secure Email that we had posted previously, but again, all of these types of tests are dependent on your test input plus your Plesk config / setup.FWIW At that ^ test site, there's a very long and informative print of data (if you add in multiple items to be tested, all at the same time, as we always do) but, that's too much to be posting here, instead, here's the summary box (image) from a "To" test that's just been run. We've removed (sanitized) the domain name, plus the MX (mail server) ID and both the IPv4 and IPv6 addresses (hence the two spearate lines in the box) for the reasons that we've already mentioned.
marvin
Basic Pleskian
Sorry @learning_curve , that email was sent prematurely. Test results were from SSL Server Test (Powered by Qualys SSL Labs)
In fact the first screen on this test pinpoints the problem quite exactly:
This shows the error but I'm not sure how it happened (I was using standard Plesk tools like Let'sEncrypt to issue certificate and, as you have said, everything on that side appears to line up.
According to Secure Email I have a confidence factor of 98% (why?)
In fact the first screen on this test pinpoints the problem quite exactly:
This shows the error but I'm not sure how it happened (I was using standard Plesk tools like Let'sEncrypt to issue certificate and, as you have said, everything on that side appears to line up.
According to Secure Email I have a confidence factor of 98% (why?)
marvin
Basic Pleskian
Just tested another site that I host. Webmail login returns a default Apache page informing me that the site is working properly, but not the End of File Error page I get on my own domain... and definitely NOT the Webmail login screen I was expecting!!
Methinks something is rotten in the state of Plesk... or perhaps more correctly the VPS itself!!
And now I can't even log into Plesk!!!
Methinks something is rotten in the state of Plesk... or perhaps more correctly the VPS itself!!
And now I can't even log into Plesk!!!
marvin
Basic Pleskian
OK. I've used SSL Server Test (Powered by Qualys SSL Labs) to analyse this issue.
Of the ten sites I host on this VPS, only three have email services (whew!)
These three sites (mydomain.co.nz included) all have the same issue, i.e a conflict with the certificate for myvps.co.nz which is the hosting server.
As verified in Plesk, all certificates issues by Let'sEncrypt are correct. The only reason I haven't seen issues with IMAP on the other sites is because their security certificates have NOT auto-renewed.
Which leads me to think that the actual problem lies with the security certificate for myvps.co.nz itself. Despite the fact that it is apparently valid we have a comparatively 'flat' server structure -- all sites are effectively hosted on the same level withing the VPS. I.E. there are no sub-sites, sub directories, etc.
Furthermore, since this server was configured (circa 2020 if memory serves correctly) I have normally struck 'trust' issues when logging in as Root user. By which I mean there was no security certificate in place and I needed to 'trust' the server to log in. IE there was no actual 'conflict' with the certificates of sites hosted on the VPS. Not sure when this stopped but I assumed my PC had learned to 'trust' this login?
I don't know when a certificate was applied to myvps.co.nz (I didn't actively apply this), but it would appear that IMAP has detected an apparent conflict (over the past year there has been an apparent conflict in POP3 but I have been able to 'trust' the service and mail has come through normally. I can't do this in IMAP services on my phone or webmail).
Phone service may continue normally (I didn't have any issues until I re-set the email account on my phone) but webmail services are all affected).
The solution?:
thoughts?
Of the ten sites I host on this VPS, only three have email services (whew!)
These three sites (mydomain.co.nz included) all have the same issue, i.e a conflict with the certificate for myvps.co.nz which is the hosting server.
As verified in Plesk, all certificates issues by Let'sEncrypt are correct. The only reason I haven't seen issues with IMAP on the other sites is because their security certificates have NOT auto-renewed.
Which leads me to think that the actual problem lies with the security certificate for myvps.co.nz itself. Despite the fact that it is apparently valid we have a comparatively 'flat' server structure -- all sites are effectively hosted on the same level withing the VPS. I.E. there are no sub-sites, sub directories, etc.
Furthermore, since this server was configured (circa 2020 if memory serves correctly) I have normally struck 'trust' issues when logging in as Root user. By which I mean there was no security certificate in place and I needed to 'trust' the server to log in. IE there was no actual 'conflict' with the certificates of sites hosted on the VPS. Not sure when this stopped but I assumed my PC had learned to 'trust' this login?
I don't know when a certificate was applied to myvps.co.nz (I didn't actively apply this), but it would appear that IMAP has detected an apparent conflict (over the past year there has been an apparent conflict in POP3 but I have been able to 'trust' the service and mail has come through normally. I can't do this in IMAP services on my phone or webmail).
Phone service may continue normally (I didn't have any issues until I re-set the email account on my phone) but webmail services are all affected).
The solution?:
- remove security certificate from myvps.co.nz and eliminate possible conflict?
- Forget about hosting email on Plesk and move to another email provider (hi GMail?)...
thoughts?
@marvin, we discussed the issue in Resolved - dovecot imap ssl - not working before. You then opened this new thread on the same question, because you felt the previous answers insufficient, and @learning_curve has invested a lot of time and effort to assist here again. To me it seems that you do not like the answers given. The simple truth is that your certificate(s) do not match the hostname. For example in your own post above it is clearly said that your certificate is made out to server.myvps.co.nz, not myvps.co.nz or anything else. It does not make sense to try forcing another mailserver name in your clients and to expect that the SSL certificate works for the other name, too. It won't. In your post Resolved - dovecot imap ssl - not working you were convinced that your servername is right, but obviously it is not.
Maybe a good approach to solve this issue would be to reconsider the prerequisites of the situation. Can the server name really be correct when tests tell you that it is not? Can it be right when the mail client complains that the certificate does not match what was entered as the server name?
Here we are again at the bottom of page no. 2. In order to get to the root of the issue I suggest you review all what has been said. I have doubts that anything else can be added to the discussion. Instead, it could be helpful if you tried to accept the answers already given. You'll need to re-think your setup in order to solve the issue.
Please consider submitting a ticket to Plesk support so that Plesk can assist you directly on your server to set it up correctly. To sign-in to support please go to https://support.plesk.com
If you experience login issues, please see this KB article:
https://support.plesk.com/hc/en-us/...rt-plesk-com-and-password-reset-does-not-work
If you bought your license from a reseller, your reseller should provide support for you. If the reseller does not provide support, here is an alternative:
https://support.plesk.com/hc/en-us/articles/12388090147095-How-to-get-support-directly-from-Plesk-
Maybe a good approach to solve this issue would be to reconsider the prerequisites of the situation. Can the server name really be correct when tests tell you that it is not? Can it be right when the mail client complains that the certificate does not match what was entered as the server name?
Here we are again at the bottom of page no. 2. In order to get to the root of the issue I suggest you review all what has been said. I have doubts that anything else can be added to the discussion. Instead, it could be helpful if you tried to accept the answers already given. You'll need to re-think your setup in order to solve the issue.
Please consider submitting a ticket to Plesk support so that Plesk can assist you directly on your server to set it up correctly. To sign-in to support please go to https://support.plesk.com
If you experience login issues, please see this KB article:
https://support.plesk.com/hc/en-us/...rt-plesk-com-and-password-reset-does-not-work
If you bought your license from a reseller, your reseller should provide support for you. If the reseller does not provide support, here is an alternative:
https://support.plesk.com/hc/en-us/articles/12388090147095-How-to-get-support-directly-from-Plesk-
marvin
Basic Pleskian
Hi again @Peter Debik . Thanks for the help you have given so far. I opened the second thread because I felt I was closing in on the root cause of a problem that has been a problem for over a month. @learning_curve has made some suggestions I have found useful.
I have established that of the 10 domains I host in this VPS three domains (my own domain included) are affected by this issue. As unlikely as it may seem, IMAP is detecting a conflict between the certificates assigned by Let’sEncrypt and the certificate assigned to my Plesk VPS. It would seem that I’m able to make an exception to this conflict in POP3 and SMTP connections but not in IMAP. Which is why IMAP refuses connections with the designated mail server account (mail.mydomain.co.nz). IMAP keeps looking at mail.myvps.co.nz and seeing a conflict that I cannot make an exception to.
This problem first occurred on my wife’s email account. When I reset my account (which was working) I believe I lost an exception that he’d been stored, with the result that I no longer have IMAP access.
I guess you feel this is chasing unicorns instead of horses, but this is all I can put things down to. My ISP has said they can’t help me because they have no access to my VPS, and I should go to the Plesk forum. Plesk themselves won’t help me because my copy of Plesk is licensed to my ISP, so I don’t have a licence with them.
This is all proving to be very frustrating. I’m not a web server guru — this is why I have Plesk on my VPS. I don’t know if the problem is with the SSL certificate of the VPS itself, but each individual site on the VPS has valid credentials.
At this stage all I can think is to see if renewing the credentials for Plesk VPS itself would fix the problem, or if I have to dispense with Plesk-based email totally and find an alternative method.
@Peter Debik — you have said in the past that the problem is not Plesk, or Dovecot, but that my security configurations are wrong. I’m not disagreeing with you, but I’m also pointing out that I didn’t specify these settings. I’m not sure when or how the security certificate for Plesk was generated within Plesk. Problem is IMAP thinks there’s a conflict. And all I want to know is how to reassure IMAP that things are OK
*sigh*
I have established that of the 10 domains I host in this VPS three domains (my own domain included) are affected by this issue. As unlikely as it may seem, IMAP is detecting a conflict between the certificates assigned by Let’sEncrypt and the certificate assigned to my Plesk VPS. It would seem that I’m able to make an exception to this conflict in POP3 and SMTP connections but not in IMAP. Which is why IMAP refuses connections with the designated mail server account (mail.mydomain.co.nz). IMAP keeps looking at mail.myvps.co.nz and seeing a conflict that I cannot make an exception to.
This problem first occurred on my wife’s email account. When I reset my account (which was working) I believe I lost an exception that he’d been stored, with the result that I no longer have IMAP access.
I guess you feel this is chasing unicorns instead of horses, but this is all I can put things down to. My ISP has said they can’t help me because they have no access to my VPS, and I should go to the Plesk forum. Plesk themselves won’t help me because my copy of Plesk is licensed to my ISP, so I don’t have a licence with them.
This is all proving to be very frustrating. I’m not a web server guru — this is why I have Plesk on my VPS. I don’t know if the problem is with the SSL certificate of the VPS itself, but each individual site on the VPS has valid credentials.
At this stage all I can think is to see if renewing the credentials for Plesk VPS itself would fix the problem, or if I have to dispense with Plesk-based email totally and find an alternative method.
@Peter Debik — you have said in the past that the problem is not Plesk, or Dovecot, but that my security configurations are wrong. I’m not disagreeing with you, but I’m also pointing out that I didn’t specify these settings. I’m not sure when or how the security certificate for Plesk was generated within Plesk. Problem is IMAP thinks there’s a conflict. And all I want to know is how to reassure IMAP that things are OK
*sigh*
That is because your mail server name that you are using in your devices does not match the hostname for which you have a mail server certificate.
That is why I suggested:
learning_curve
Silver Pleskian
Didn't see / get involved that other thread sorry, so can't comment on that. However, at the risk of being blunt, can say that on this thread, we have asked several questions, which for whatever reason, you've simply not answered. The irony of that is, that the person suffering most from that, is yourself.
See above comment, then refer back to previous comments / questions re: your own management of Plesk config / setup, plus relevant previous experience etc
Again, see previous comments ^ but also, we (just as @Peter Debik has done, a few times now) previously suggested that you raise a Plesk Support Ticket in order to resolve all of your own, current management of Plesk config / setup issues, because from what you've posted / half-posted so far in this thread, Plesk is absolutely NOT the cause or indeed the issue in this case.
The "...I don't have a licence with them..." (sic) is posted regularly by users on this forum, but, is normally immediately responded to with an informative, simple solution (again as @Peter Debik has done, a few times for you now). It's a very cost-effective solution for you and there appears to be no stated or valid reason, why you haven't / couldn't have done this already, especially as it will resolve all of your own stated, issues.
Again, see previous comments, then please proceed with raising a Support Ticket, thus avoid any more speculative, time wasting exercises (for yourself - that is).
Great. That ^ is correct.
Who did? Unless there's a big misunderstanding, only you have root access to your Plesk / VPS etc & to date, there's only you administratively managing this.
Again, see previous comments...
An ironic closing statement
Still, please make a final post, once your support ticket and Plesk technical support staff resolve all of your own, current management of Plesk config / setup issues. Based on the content of this thread, to date you'll definitely need to grant the Plesk technical support staff Access to your Plesk / VPS via SSH in order for you to achieve a timely conclusion (you posting all of the details etc in messages within that ticket will take too long).
marvin
Basic Pleskian
OK, final post as to how this matter has been resolved.
Firstly thanks to @Peter Debik and @learning_curve for bearing with me through this issue. It's been a long process and your contributions were appreciated. I can see why you were tired of this matter in the end. Two forum pages later and this matter was no closer to becoming resolved.
As suggested, I approached Plesk Technical Support. After initial difficulty logging in because I was not able to register an account or reset my password, PLesk contacted me via email:
OK. That sounds promising!
I was unable to find the answer for my Security Certificate Issue in https://support.plesk.com/hc/en-us
I felt that the Plesk Facebook Community would share a very similar response to my experience on the Plesk Forum -- helpful to a point but unable to communicate a satisfactory solution to this issue.
Having actually contacted Plesk Support I decided to continue:
To which Plesk replied:
Cool. As it happens I DO have administative access... But Plesk then delivered the killer blow:
Great. So despite paying my Plesk Reseller a monthly fee for the service I DON'T have any Technical Support from Plesk themselves unless I purchase a Technical Support Subscription ?!!
Back to my ISP. They confirm there is a conflict with SSL Certificates for my Plesk VPS and individual site certificates. The can see the error message that verify this. Believing that is could be that Plesk only allows ONE certificate on a server for email, they suggest I use the same SSL certificate to verify ALL domains hosted on this VPS. This doesn't work. They can't really advise more as they don't actually use Plesk email.
I've had enough. I moved my email services to a new provider and full service has been restored. As I did this, I heard from one of my clients hosted on this server. Her SSL certificate auto-renewed 26th June and she's just discovered she can't send email form her phone. Sounds familiar?
I'm moving her email from Plesk to another provider today.
Firstly thanks to @Peter Debik and @learning_curve for bearing with me through this issue. It's been a long process and your contributions were appreciated. I can see why you were tired of this matter in the end. Two forum pages later and this matter was no closer to becoming resolved.
As suggested, I approached Plesk Technical Support. After initial difficulty logging in because I was not able to register an account or reset my password, PLesk contacted me via email:
OK. That sounds promising!
I was unable to find the answer for my Security Certificate Issue in https://support.plesk.com/hc/en-us
I felt that the Plesk Facebook Community would share a very similar response to my experience on the Plesk Forum -- helpful to a point but unable to communicate a satisfactory solution to this issue.
Having actually contacted Plesk Support I decided to continue:
To which Plesk replied:
Cool. As it happens I DO have administative access... But Plesk then delivered the killer blow:
Great. So despite paying my Plesk Reseller a monthly fee for the service I DON'T have any Technical Support from Plesk themselves unless I purchase a Technical Support Subscription ?!!
Back to my ISP. They confirm there is a conflict with SSL Certificates for my Plesk VPS and individual site certificates. The can see the error message that verify this. Believing that is could be that Plesk only allows ONE certificate on a server for email, they suggest I use the same SSL certificate to verify ALL domains hosted on this VPS. This doesn't work. They can't really advise more as they don't actually use Plesk email.
I've had enough. I moved my email services to a new provider and full service has been restored. As I did this, I heard from one of my clients hosted on this server. Her SSL certificate auto-renewed 26th June and she's just discovered she can't send email form her phone. Sounds familiar?
I'm moving her email from Plesk to another provider today.
learning_curve
Silver Pleskian
FWIW We don't work for Plesk / have no professional and/or other close association with them.
Your Plesk licence was/is issued via your own VPS hosting provider (presumably that's not the same as your ISP). You are currently paying them, not Plesk.
You didn't explain (in the above) what happened when you asked your Plesk licence holding, VPS hosting provider (not your ISP) to solve your e-mail issues.
Understandable if you didn't (many do - but with poor responses & many don't, as they choose to deal directly with Plesk and not via an intermediary)
More importantly, in terms of speed / resolution etc You do have a very clear option to deal directly with Plesk yourself, via a subscription, which, do remember is a) Free - for the first month b) Can be cancelled at any time. This means, that simply by being well organized, you could seek free support, directly from Plesk.
No further comments on this ^ "ONE certificate" (sic) belief, other than, it's incorrect. Context and/or lack of, is very relevant in this case.
As per previous posts... Your errors are not just because you're using Plesk... Plesk technical support staff could / would no doubt resolve all of your own, current management of Plesk config / setup issues that are the actual cause of them, but you've chosen a different option, which you're completely satisfied with.
So, you're happy again, your e-mail service is now fully functional and this specific thread can be closed, as it requires no further actions / input from this forum.
marvin
Basic Pleskian
Hi @learning_curve , firstly I do realise that many Plesk Forum members are totally independent of Plesk (ie they don't work for the company) and give up their time to offer solutions. Your input on this issue was much appreciated, (wanted to emplasise this) particularly in respect to testing SSL certificates and configuration and verifying that there was an actual conflict with the VPS SSL certificate.
Secondly, I had numerous conversions with my VPS Hosting Provider (not my ISP) regarding this issue. When you purchase a VPS from them they make it clear they offer limited support as they are unable to access the VPS Configuration and elements themselves. I'm not sure why they say this as they configured Plesk on the VPS in the first place and logically, must have Root User access but there you go...
My VPS Hosting Provider (not my ISP) has never struck this issue as they don't use Plesk for email themselves. In fact I am wondering if they have an issue with SSL certificate configuration as I occasionally need to make exceptions when accessing my VPS and 'trust' the page I am visiting.
Presumably my VPS Hosting Provider (not my ISP) is paying Plesk a licence fee. Something in my communications with Plesk made me think that this meant that as a registered user (albeit through a third party) this cover extended to me. Apparently not. And while I could have paid for a licence from Plesk (free for the first month) I had lost confidence in the reliability of Plesk as an email platform. Consider this: everything was working fine, emails over IMAP were being received, emails were being received over POP3 (with an 'exception' granted) and emails were going out over SMTP. Until my personal domain security certificate renewed and then suddenly they weren't.
In effect, whatever configuration that was there before worked, SSL certificate renews and then it doesn't. I didn't physically change anything between things working and things not working.
Finally the 'random' nature of this event (one device can send but not receive, one can receive but not send, then I get and SSL Certificate not trusted error and all the websites hosted on this VPS go down until server apparently resets).
Which is why I no longer 'trust' Plesk for email services.
Secondly, I had numerous conversions with my VPS Hosting Provider (not my ISP) regarding this issue. When you purchase a VPS from them they make it clear they offer limited support as they are unable to access the VPS Configuration and elements themselves. I'm not sure why they say this as they configured Plesk on the VPS in the first place and logically, must have Root User access but there you go...
My VPS Hosting Provider (not my ISP) has never struck this issue as they don't use Plesk for email themselves. In fact I am wondering if they have an issue with SSL certificate configuration as I occasionally need to make exceptions when accessing my VPS and 'trust' the page I am visiting.
Presumably my VPS Hosting Provider (not my ISP) is paying Plesk a licence fee. Something in my communications with Plesk made me think that this meant that as a registered user (albeit through a third party) this cover extended to me. Apparently not. And while I could have paid for a licence from Plesk (free for the first month) I had lost confidence in the reliability of Plesk as an email platform. Consider this: everything was working fine, emails over IMAP were being received, emails were being received over POP3 (with an 'exception' granted) and emails were going out over SMTP. Until my personal domain security certificate renewed and then suddenly they weren't.
In effect, whatever configuration that was there before worked, SSL certificate renews and then it doesn't. I didn't physically change anything between things working and things not working.
Finally the 'random' nature of this event (one device can send but not receive, one can receive but not send, then I get and SSL Certificate not trusted error and all the websites hosted on this VPS go down until server apparently resets).
Which is why I no longer 'trust' Plesk for email services.
learning_curve
Silver Pleskian
At the risk of stating the obvious... Regardless of your chosen Hosting Provider, delivering a pre-configured VPS package to you, as per your order to them, a VPS package that was complete with a Plesk licence, but one that offered limited support for Plesk only through them, you, not them, took over configuration, management and maintenance of that VPS package, at root level aka Full accountability & responsibility, for its continuous, successful operation. It's that simple.
There's so many ifs / whats / maybes / assumptions / diversions and avoidance statements in there, that it's too discombobulated to follow and or ratify.
That's entirely your own experience and decision, which you've moved on from, by taking another option that you're confident in using. Maybe a little blunt, but the reliability of Plesk as an e-mail platform, quite possibly supersedes your own levels of pro-active management of your VPS's Plesk configuration & usage. This applies to other Plesk users too, so isn't unique or a failure of any kind, but Plesk ending up as collateral damage due to blame shifting is just plain wrong. Even more so, when despite the reasons for your own Plesk e-mail and/or SSL Certificates config failures being identified several times, they have been ignored.
Please refer back to "Full accountability & responsibility..." in the opening paragraph.
That should hopefully explain all you need to know, as opposed to making any more assumptions.
Again, That's entirely your own experience & decision, which you've moved on from, by taking another option that you're confident in using. Many other Plesk users may well have a completely different opinion though (based on all of the posts in this thread and... their own experiences with Plesk / Plesk e-mail / Plesk technical support etc etc ) & there's nothing wrong with that. Not seeking to start or continue arguments with you. It's a closed item now. So let's all move on.
