Issue Postfix Issues with Alma Linux 9.4

[SamirM]

Server operating system version

Alma Linux v9.4

Plesk version and microupdate number

Plesk Obsidian 18.0.64 Update #1

My DC setup a new server running Alma Linux 9.4 instead of upgrading the existing CentOS v 7.9 and subsequent to that I performed a migration and transfer from the old server to the new.
While everything works fine, am having issues with the mail server, more specifically POSTFIX, previous server was using QMAIL & DOVECOT, however QMAIL isnt supported on the Alma Linux server .
While sending mails from Outlook, clients are reporting the following error message ( see OutlookIssues_12102024.jpeg)
And when i try to create an account on OUTLOOK, it reports the following issue: (see: OE_AcctSetup_Issues_12102024.jpeg)

Also when I try to run the Plesk repair utility from the control panel, I get the following message

failed

Reconfiguring all domains and mailboxes mchk failed: ==> Checking for: mailsrv_conf_init... fail

This however isnt reported when i run the mchk from the SSH terminal

Appreciate any help, TIA

Samir

 

[Maarten]

Can you provide the SMTP settings currently configured in Outlook? This will help us pinpoint if there’s a configuration issue. Also, this thread might give you some helpful insights into similar issues:
Issue - SMTP Auth not working

 

[SamirM]

Maarten, here is what my configuration looks like

 

[Maarten]

Can you change the following:
Server: domain.com
Check "This server requires an encrypted connection (SSL/TLS)"

 

[SamirM]

That didnt work, get the same message : We couldn't connect to the Incoming (POP) using the specified encryption method.....

 

[Maarten]

Can you look at this thread?

Issue - SMTP Auth not working

After a fresh install with Debian 10.7 PLESK Plesk Obsidian 18.0.32 postfix Outgoing mail mode: Send from domain IP addresses SSL Certificats are good When trying to setup a mail account in Outlook or on IOS I get IMAP working fine but SMTP Auth with everyting I tried is not working Outlook...

talk.plesk.com

 

[SamirM]

That too doesnt work

 

[Maarten]

I recommend contacting Plesk Support so they can investigate the issue directly on your server.
To sign in for support, visit: Plesk Support

If you purchased your license through a reseller, they should provide support for you.
In case your reseller doesn’t offer support, Plesk provides an alternative with a free first month. You can find more details here: Plesk Support Offer