Can anybody help me how i can debug why my mail is not being send

I just upgraded to 6.0.7. on linux debian and beside the upgrade i allso want to send out my email through a different mail server.

Now i am sending on port 587 with a validated user, when creating the same user on a different mailserver with the same password i am unable to send the msg.
As i assume it has something to do with the mailserver config, i am very interested in the error msg from the mail server.

Is there a seafile log file that records the reason WHY i can not send the msg out?

Kind Regards
Gerard

You may check seahub.log to see if it contains the error log.