Emails not working with Outlook anymore ? SNI setup?

Support and Discussion
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Hello, I am currently using CyberPanel latest 2.4.2 on my VPS. I got a bunch of website with mail servers on my VPS. Every mails existing were perfectly working with outlook since this morning (or maybe before I didnt notice…) … Now I checked and the issue is with SSL certificates .. My certificates are all Let’s Encrypt issued and perfectly active for all domains (and mail.domain.ltd too) … But I cannot login on Outlook (But I can on WebMail and Thunderbird) … So I did some research and found out that maybe Outlook updated their SSL checkup which might need a full chain SSL now … So I was wondering HOW , can I make it work ? I know that there’s something called SNI (Server Name Indication) which allows your mail server to present different SSL certificates depending on the mail server name the client is connecting to… So should I setup SNI support myself .. and if I do will I need to add everytime a new domain is added to my VPS … Or is CyberPanel able to do this on their own ? What should I do …

Operating System : AlmaLinux 9
CyberPanel :

Current Version: 2.4
Build: 2
Current Commit: 66ccef35e79d803e6be93954038feb02d0fd950f
Latest Version: 2.4
Latest Build: 2
Latest Commit: 0b97f848dfac26db4b43680099e22607d4e6ec2e

Thanks to y’all , I will wait patiently for an answer :slight_smile:
Charles W.

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Anyone have a solution ? I really need to fix this issue today :frowning:

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Okay I found my solution myself … if anyone got the same problem here is what I did :

SSH into my VPS @root and ran the following commands :
postmap -F hash:/etc/postfix/vmail_ssl.map
systemctl restart dovecot
systemctl restart postfix

After that I was able to Sync/Connect my email to Outlook perfectly !

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