Question Analyzing Maillog: User unable to Send Emails

[elbobo]

Server operating system version

CloudLinux 7.9

Plesk version and microupdate number

18.0.56 Update #4

Recently I received a complaint from one of my clients that throughout a specific date they were unable to send emails although receiving was not an issue. I want to find the cause if one exists and it was not a problem on the client's side. So I am reviewing Plesk logs (/var/log/maillog) but I am not proficient enough to understand what I am seeing. How can I go about in order to find the cause?

 

[Peter Debik]

Maybe you can ask Plesk support to check it on your server?

https://support.plesk.com

 

[AYamshanov]

Or as an example, with the Log Browser extension, you could try to find records about client's email on specific date/time (e.g. email id, errors, etc.) and try to google more details about found messages if any.