POP3 connector randomly freezing

Hello everyone.
I have a problem with a server where several pop3 connectors are active to deliver mail internally. Everything works without problems, but randomly some connector freezes and to restart it I have to deactivate it and reactivate it.
What could I control?
Thank you

Hi and welcome to NethServer Community,

are there errors in /var/log/messages or /var/log/maillog ?

Maybe it helps to increase the fetch interval?

Which mail provider do you use? Is it about GMail?

I recommend to use NethServer as mail server instead of using pop connector/smarthost if possible. Check out the wiki and the documentation for more details.

Related topic:

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Hi Markus and thanks for the welcome.
In the log files I do not notice any particular problem.
I tried to increase the fetch interval to 10 minutes, but I did not solve the problem.
The provider is a local provider (etics.it).

I searched the web regarding etics and getmail…but without success.
Maybe try another protocol (IMAP, POP3) to get the mails?
Here is some documentation about how getmail is implemented.