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In Apache Web Server Settings the http/2 module is enabled. However, if I launch Speed Kit this suggestion appears: Use HTTP/2 Your website is currently using HTTP/1.1. With Speed Kit, everything will be fetched over an encrypted HTTP/2 connection. Why?

@GwenDragon @mow I have already replied, several times, to your comments. I repeat them again: My server name is Server-Name My domain name is my-plesk-domain.eu In Plesk, Tool & Settings / Server Settings I registered the Full hostname Server-Name.my-plesk-domain.eu. It's always been this...

@scsa20 I asked because with the new 18.0.50 update the default policy has changed, but only for new domains. I was wondering if it is appropriate to do it also for those who have already created them.

I don't want to hide anything. I have problems with mail going to SPAM and using that name as reverse DNS is one of the suggestions

dig @8.8.8.8 sweet-hoover.MY-Plesk-IP.plesk.page +short return nothing.

dig @8.8.8.8 -x MY-IP +short return sweet-hoover.MY-Plesk-IP.plesk.page

With MXToolbox, the rDNS of my IP just returns sweet-hoover.MY-Plesk-IP.plesk.page and reports it correct. Furthermore, I repeat, my Full Hostname is reported to me as an error by Mail-Tester and instead it is this name that is suggested to me

I want to insert the List_Unsubscribe header in Postfix so that it can also be used by clients like Thunderbird and not only by WebMail Roundcube. How can I do it?

Since I continue to have problems with SPAM, I'm wondering if I should change the TXT records for DKIM and DMARC. DNS is managed by the ISP and not by Plesk. Thanks in advance.

My hostname is entered correctly (name-server.domain.tld) Mail-Tester gives me another error with the hostname and instead suggests me again Your IP address MY-IP is associated with the MYDOMAIN.TLD domain. Instead, your message appears to have been sent from...

I continue to have my sent mail considered as SPAM, both by Google and by some recipients and I no longer know how to fix the problem. List Unsubscribe Creating a header in Roundcube doesn't fix it because the mail could be sent from Outlook or Thunderbird. From what I understand, we need to...

:oops: Damn, this value is in Kilobytes! OK. Solved! Thanks.

@scsa20 @Peter Debik I tried to send this zip from Thunderbird but it returned this error message: The server replied: Message size exceeds fixed limit. So the problem not with Roundcube, but with the server or Dovecot

I redid the configuration bringing the value to 100MB. I put the directive in ModSecurity. I changed the bandwidth limitation. I also turned on logging But I continue to find in the Roundcube that generic error that I reported in the initial post and in the system and email logs I don't see any...

@scsa20 I've tried disabling ModSecurity, but I always get the error as soon as I upload the file.

@scsa20 I may have exaggerated with a 512MB limit, but the attachment is a zip of only 42MB. Doesn't seem excessive to me. I didn't understand why ModSecurity would restrict me one attachment. Roundcube is a service managed directly by Plesk, or am I wrong. There is plenty of disk space and ISP...

To increase the value of the maximum attachment size for Roundcube I followed this guide. When I upload a 42MB zip file, it gets to 100%, but then I get the error below. In the Logs I don't see any errors, only info and warnings. Maybe I'm looking in the wrong place? I'm using the Browser Log...

All mail sent from mailbox in Plesk to Google mailbox is placed in spam folder. Newsletters spam test by mail-tester.com suggests: For SpamAssassin Message has a DKIM or DK signature, not necessarily valid. This rule is automatically applied if your email contains a DKIM signature but other...

For the series "I thought I knew everything and I lacked the basics" Thank you very much. I close the ticket and I'm left with the list_unsubscribe problem

Isn't 25 the outgoing mail? Why should it not allow mail to be received if it is missing?