Question slow incoming mails plesk

[agaitan]

Server operating system version

RockyLinux 8

Plesk version and microupdate number

Plesk Obsidian Web Host Edition Version 18.0.44 Update #3

Hi any way to optimize or tune postfix and smtp from plesk? example on my mail client on mobile phone, takes long to receive incoming, I know it depends on the mail client, but anything i could tune of postfix plesk configuration?

thank you

 

[IgorG]

You can talk about postfix optimization, but it's too vague, and it's good to understand what needs optimization. Most likely nothing.
For starters, I would suggest investigating the Plesk maillog. Perhaps you can find the cause of the problem there and fix it on purpose.

 

[agaitan]

but how you fix that issue? mails come very slow on mobile always need to open app to receive mails. Before i had not that issue, and is not me only, all my clients with diff mail clients

 

[Maarten]

Like Igor said, take a look at the maillog.

If you're using Dovecot, try to enable debug mode: https://support.plesk.com/hc/en-us/articles/115003712374-How-to-enable-Dovecot-debug-logging-
Find the logfile using: doveadm log find

Check which hostname you and your customers use to contact the mail server. Check that hostname for issues (DNS, SSL, etc.)

 

[Bitpalast]

mails come very slow

What is "slow" compared to "fast"? Is the individual download process of a single mail "slow"? Or does it take a long while until the phone realizes that there are new mails that it should pick up and this is what you consider "slow"? Did you actually measure the speed and how did you measure it or is it more a feeling that something feels slow?

 

[Hangover2]

If mails come in later than expected, check if grey listing was maybe suddenly activated on your server. If you see errors like "Warning: Inotify instance limit for user..." in your mail log, consider raising fs.inotify.max_user_watches and fs.inotify.max_user_instances. Only my two thoughts. And as @Peter Debik said already, we need first more input.