Issue Plesk with Mailenable generates masses of emails

[Inetfreaksde]

Server operating system version

Windows Server

Plesk version and microupdate number

Version 18.0.70

For the last three days I have had the problem that my server has been generating masses of e-mails on its own. These e-mails are always sent to two external addresses and contain the message "Antivirus has found viruses in the e-mail coming from “[email protected]” to the following recipients “[email protected]”. The message was deleted."

Who generates these emails and why?

 

[scsa20]

Review the header details, it usually gives you an idea of what's generating it.

 

[Inetfreaksde]

When I stop the SMTP service on the server I can see how the amount of emails in the ‘outbound queue’ builds up. These are exactly the two types of emails that are generated directly into the queue. The ‘message information’ looks exactly like the picture below.