Issue Plesk Obsidian 18.0.73 Dovecot failed to start after install

[LRLD]

Server operating system version

Ubuntu 24.04.3

Plesk version and microupdate number

Plesk Obsidian 18.0.72 Web Pro Edition

Hi,

there's issue starting Dovecot after upgrade, caused by /etc/dovecot/conf.d/11-plesk-security-pci.conf and unknown setting disable_plaintext_auth

I have commented this out to get Dovecot started again.

I just wanted to bring this to the attention of @Sebahat.hadzhi

Thanks

 

[King555]

I get doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/11-plesk-security-ssl.conf line 4: ssl_prefer_server_ciphers: Unknown setting: ssl_prefer_server_ciphers

I commented out the mentioned line: #ssl_prefer_server_ciphers=yes

Now it works. The file mentioned in post #1 does not exist on my server

 

[KirkM]

I commented out the mentioned line: #ssl_prefer_server_ciphers=yes

This worked for me. I also don't have the file mentioned by the OP.

This seems to me to be an issue with the update. That setting should be there and should work. Plesk needs to issue an immediate patch.

 

[KirkM]

I just wanted to bring this to the attention of @Sebahat.hadzhi

Thanks for jumping on that LRLD!

 

[G J Piper]

Seems like the pci_compliance_resolver utility having been run in the past makes configuration files that are incompatible with the new Plesk 18.0.73 dovecot update. Mine was so unfixable I had to restore my whole server from backup to get email working again. :-(

 

[LRLD]

I have pci_compliance_resolver enabled on my servers which is why I have a different error.
I still have ssl_prefer_server_ciphers but mine is set to no, so I didn't need to touch it.

To add to my initial post, I decided to create a file /etc/dovecot/conf.d/99-require-ssl.conf and added ssl=required, which gave a warning about 10-plesk-security.conf so I commented out the line disable_plaintext_auth = no in that file too.

 

[moswak]

Exactly the same thing happened to me.
But I've disabled automatic updates. It's unthinkable that this would cause the mail servers to suddenly stop starting overnight. Plesk should fix this quickly, please.