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postfix

  1. S

    Issue Can't receive emails

    I am running my Plesk instance on AWS Light Sail and I recently did a fresh install on it. I'm able to use SES to send out emails through Postfix (I did request to have port 25 removed but I am waiting for a response from AWS) I tried sending an email from one of my gmail accounts to my...
  2. I

    Issue Postfix uses old cert for local connections only

    Hey Plesk-Community, i suddenly ran into a strange problem with my postfix service. The mail-service is still running fine and so do the ssl-certificates. All clients are connecting properly via smtp. But when i try connecting locally e.g. via openssl to smtp i get an verification error (10)...
  3. E

    Resolved Postfix error / Recipient address rejected: User unknown in virtual mailbox table

    Hi all, We have problem with some users ([email protected]) that send email to another with the same domain ([email protected]): 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table We try to repair: #plesk repair mail But still the problem. All...
  4. S

    Issue Unable To Connect with IMAP via Mail Client (Webmail Works)

    I have a VM on Google Cloud running Ubuntu 18.04.5. Having an issue setting up iOS (mobile) and Thunderbird (desktop) mail client for a domain, which tells me it’s not the client itself nor the device that’s the problem. I’ve tried with and without VPN. I’ve tried to disable Failed2Ban...
  5. H

    Issue Using postfix to relay emails: Removing/masking client IP address how?

    Using Plesk Obsidian with postfix 3.5.9 and relay option for authorized users only. It works well, but all outgoing email that leaves the server has full IP information of the client that connected in the header, e.g.: Received: from [192.168.1.110]...
  6. B

    Issue Amavis Error on sending emails

    Hello, So, I installed Plesk Email Security Extension, and I have everything working correctly on Inbound messages. But, when I try to send an email (with and without files), it gets all deferred on Postfix status. Even waiting one hour to try to deliver the message, it's just on a "hold"...
  7. L

    Issue PPPM-13129 still not resolved?

    It seems that the patch doesn't helped. I still get the following Errors in maillog: Can anybody confirm this? Plesk Obsidian Version 18.0.37 Update #2 Thanks!
  8. J

    Issue 421-4.7.28 error when sending mail to Google server

    Since 8:20 UTC my mail gets rate limited by Google with the following message in the mail log: "Our system has detected an unusual rate of 421-4.7.28 unsolicited mail originating from your IP address. To protect our 421-4.7.28 users from spam, mail sent from your IP address has been temporarily...
  9. M

    Question Prevent outbound spam from Plesk

    I am looking for best practices to prevent outbound spam on Plesk other than this article https://docs.plesk.com/en-US/onyx/administrator-guide/mail/protection-from-outbound-spam.71349 Recently, one [email protected] on my server had a compromised password. About 400 e-mails were sent from this...
  10. T

    Question Outgoing SMTP Mail Change - What happens to current mail data?

    Hello, I have a Plesk server running on DigitalOcean. DigitalOcean IP addresses all get blocked on one Spam list no matter what you do. This causes a rare amount of outgoing emails sent from Dovecot/Postfix to bounce back. I found a way to fix this by rerouting your outgoing mail server to use...
  11. F

    Issue Problem with reverse DNS (SMTP Banner) for multiple Domains

    Hello everyone, currently I struggle with the SMTP Banner. on mxtoolbox. I get the error Reverse DNS does not match SMTP Banner The plesk/mail setup is as follows. domain1.com is the main domain and also the hostname for the plesk server. Here everything is correct SMTP Banner is working...
  12. M

    Issue Mail broken after Obsidian upgrade

    I have upgraded to Obsidian 18.0.36 on a Debian 9.13 x64 system - which broke both postfix and dovecot / imapproxy I was able to fix the immediate postfix issue, namely the milter service not being available. However, mail to accounts administered through Plesk are not being accepted: Jul 1...
  13. S

    Question Rewrite forward address

    When I setup a forward SRS keeps using the original sender as the sender even when it is forwarded. To make this more clear; An email send from [email protected] to [email protected] is forwarded to [email protected] When it arrives at [email protected] it remains the senders email [email protected] What I...
  14. R

    Issue DKIM signature contains h=Received

    Hi, after migrating from plesk 17 to 18 some mailservers fails to verify DKIM - DKIM-Result: fail (wrong body hash: this happen with mail.com and some others mailservers Gmail is ok. And DKIM signature contains h=Recived: tag But i read that signature must not contain Recived DomainKeys...
  15. W

    Question Server crashed after postfix connect

    Hi guys, I am new to the Forum. I am posting because a very weird thing happened today. I noticed a few minutes ago that my server was not reachable at all. Force restarted it via the server console. After that i checked the logs and found some very weird stuff. Postfix log: Syslog: Has...
  16. J

    Issue Prevent Postfix from delivering e-mails locally

    We're currently trying to create a seperate POP/IMAP Plesk server. Unfortunately we have a few domains that require to host mailboxes on seperate servers (eg. [email protected] towards a ticketsystem and the others to this Plesk server), we use a standalone MX server that separates the mails to...
  17. F

    Issue Email sending failed on command line

    On my Linux Plesk Obsidian 18.0.28 I am running following simple command from Linux command line to send email to my Gmail When I run above command the email does not go out and this I get following error in /var/log/maillog I tried to use sSMTP utility and configured authentication in...
  18. JmRy

    Question Fail2ban no ban ... ?

    Hello, I have no banned IP while many failed connection attempts on postfix. I think fail2ban is not working properly on my server. (Obsidian 18.0.34 on Debian 10) Its settings are the original ones and the Plesk jails are enabled fail2ban-client status Status |- Number of jail: 11 `-...
  19. M

    Question Email Queue Problem (emails from deleted domain)

    Hi there, We had a customer with a contact form which was misused for spaming. The domain from where the spam originated is now removed completly from our Plesk Server but new emails from this domain are created every some seconds and get inserted into the mail queue. But all source files are...
  20. A

    Issue Not closing 127.0.0.1:12346 connections

    Hi, Today my server suddenly stop sending email messages. In log I can find messages like: I figure out that error occur because server doesn't closing connection to 127.0.0.1:12346 and that cause server to run out of available postfix connections. I can't figure why server is not closing...
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