Question SMTP 550 bounce after 5 days?

[pvdv]

Server operating system version

Debian 11

Plesk version and microupdate number

18.0.62 Update #2

Hello,

A customer gets a bounce on a 550 SMTP bounce after 5 days. I would say it's normal to get such errors direct? Why trying many days? Is it possible to configure this behavior?

With regards,
Paul

 

[Bitpalast]

Please check Postfix Configuration Parameters "bounce_queue_lifetime" parameter in your Postfix configuration. It defines how Postfix treats mails.

4 or 5 days are industry standard, because sometimes receiving servers are unavailable, hence it makes sense to retry delivery for some while.