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smtp

  1. wakabayashi

    Question SMTP Firewall - is it possible to block brutforce attacks?

    Hello In my logs a see random trials to connect to my mail server. Entries like this While I am using Fail2Ban. It's still very annoying to see such attacks over and over again. I thought, that I could geoblock it with the SMTP Firewall Settings. I set this to "Allow from selected sources...
  2. F

    Issue Missing SMTP "received from" header

    Hi: I have been trying to report some spam messages to SpamCop. But when I report the entire message with the headers, SpamCop can't determine the source IP of the spamming server. I have checked and some messages get the "Received from" header but others (like Gmail messages) don't. Other...
  3. K

    Question Is there a way to change SMTP server address?

    Hi, I'm writing as I'm not sure this is possible in the first place but I can't seem to find any coverage of this on the Plesk forums, neither anywhere else. Currently, I'm using SMTP server to send mail from Gmail client as my domain. (In Gmail: Send as... option.). But the SMTP server for...
  4. S

    Question postfix/smtpd: could not find auxprop plugin, was searching for sql_sqlite3

    the postfix is down for unknown reason, restarted it email cannot be sent/received. I have these errors in /var/log/messages : plesk version 12.0.18 what/where should I be looking at Thanks
  5. S

    Issue Watchdog wdcollect SMTP error

    Hi everyone, I'm having consts issue with watchdog, as the alert email (for example for when Apache is down) is not being send with following errors: And it keeps looping for a long time. But on the other hand, daily emails are being sent fine with the email that was setup in the watchdog...
  6. P

    Issue Two customers on same Plesk Server with external MX can't receive mails from each other

    Both customers have an mx-record configured pointing to their company based mailservers. On the plesk side each customer has configured only one mailaccount for sending purposes. Deactivating mail service disables also the possibility to send - leaving mail service active results in trying to...
  7. H

    Question Send mail using a site Not hosted on Plesk.

    Hi there, I want to use my Plesk server as a mail server. I am using WordPress websites, which require sending emails. Before, I used MailJet (a service similar to SendGrid) as my SMTP service. I can send emails fine from the sites that are hosted on My Plesk server. These are the steps I am...
  8. T

    Issue SMTP not sent to google

    Hello, I have created an email account which I use for sending mails ( as an smtp server in my application), I got an issue is that the mails are not being sent to google. the log:
  9. L

    Issue Sending e-mails via external mail server does not work

    I would like to use my e-mail which is with IONOS for sending messages in Plesk. It's only about the outbox. I do NOT want to manage any emails in Plesk. These errors are listed in the mail logs: These are my installed e-mail components: My active services in relation to e-mail: My SMTP...
  10. P

    Resolved Force Plesk to use port 25 alternative (Digital Ocean refuses to open 25)

    There are numerous threads on this topic. I haven't found a way to force Plesk to use port 587. In the mail server settings, when I enable port 587, upon sending tests with Roundcube, the maillog indicates port 25 is still being used. Mar 21 18:25:41 my-server postfix/smtp[99165]: connect to...
  11. S

    Question Block 25 Port allow 587 port instead on Plesk

    Hello guys, I want the SMTP server to use the 587 port instead 25. So for security reason we want to use secure connection for outgoing emails. I already read this topic, as well. https://talk.plesk.com/threads/change-default-smtp-port-in-plesk.367784/ On my main.cf file there is no such as...
  12. S

    Question Mail subdomains with wrong TLS certificate (e.g. imap.example.tld)

    Hi, currently I'm migrating the websites of a plesk server into a new plesk server. In the old configuration the users are using the server domain to send/receive emails. On the new plesk server I have activated the imap.user.tld, smtp.user.tld feature. Today I migrated 3 websites and have the...
  13. C

    Issue DKIM and SPF do not align with RFC5322. Then DMARC result is fail.

    Hi, I'm having a problem when I use Mailgun with Plesk email account on one specific server. We have multiple servers with similar configuration, but this problem only happens in a specific server. The problem is that RFC5322 does not align with DKIM and SPF when using Mailgun and for that...
  14. W

    Resolved Plesk on Debian 12 and SSL mail SMTP port 465 Problem

    Hi, i cannot send mail from Thunderbird over 465 SSL. With 587 it works. Settings:
  15. W

    Question Too much connections to blacklisted bot IP's

    Hi. I've recently observed quite a large amount of outgoing connections from port 25 to numerous (malicious?) IP's through postfix, in turn creating several rather strange smtpd processes. I think they are bad bots. I'm mass banning them via fail2ban in the plesk-postfix part every time they do...
  16. W

    Question Find source of problem sending e-mail with different HELO value

    Hello everyone. Since a week ago we got into the XBL and CSS lists of Spamhaus.org, due to a problem with a mysterious e-mail sending whose HELO value is "outlook.com". This is obviously impossible because on this server we have HELO well configured with the server name, more than 400 email...
  17. T

    Resolved Webmail working, IMAP/POP+SMTP via ThunderBird etc. failing

    Hi folks, I've been banging my head against a wall for the last little while, every time I come to this issue I can't figure out what's misconfigured. Also, it is a business's email server so I don't want to cause any disruption if I can avoid. I can ping mail.quantumautomotiveni.com and it...
  18. falconsi

    Resolved PTR Record resolved, what to do for various domains?

    Hello all! I recently posted this and it's solved: BUT: I want to use this server for various email domains, @example1.com, @example2.com, @example3.com, etc. For what I learned solving above post, problem with sending to Ionos is you need to have, in your PTR record, same domain name as...
  19. falconsi

    Resolved IONOS NOT ACCEPTING INCOMING MAIL FROM PLESK - 554 BAD DNS PTR RESOURCE RECORD

    Hello all! I purchased a Plesk license after making a few tests in trial. I configured a domain in Ionos, changed nameservers to point to Plesk and everything is working perfectly (DNS prop is 100%). My problem is, when I send emails (from [email protected]) to Ionos customers, they...
  20. S

    Issue Mail delivery was aborted

    I have setup a mailserver for my client and it has been working perfectly for over 2 months, but yesterday he told me got the following error message, it just happens with this one email, every other email is still working. I checked the maillog but i have no idea what to search for...
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