if a costumer tries to send an email with a bigger attachment, the email is rejected:
Protokoll: SMTP, Serverantwort: '552 5.3.4 Error: message file too big', Port: 25, Secure (SSL): Nein, Serverfehler: 552, Fehlernummer: 0x800CCC6D
I'm using Qmail and the max filesize in the configuration is set way beyond the size of the attachment.
I also changed the settings in Plesk mailconfiguration, so there shouldn't be a problem, too.
I can't find any other way to change some setting concerning this subject.
When I try to send a message with the same attachment, but my own emailadress (same server), I got no problem.
All packages have bin migrated from version 9, but I also tried deleting the affected package and creating a new one, but without any difference in result.
The whole problem seem to occur since upgrading from version 9 to 10.