Dear,

I am using mailcow as email server with catchall.

I configured correctly the incoming and outgoing email account with success tests.

For incoming emails, the fetch is working and get all email from catchall and others emails in the leads.

For sending email, I don't know why I get this error message :

NOQUEUE: reject: RCPT from unknown[10.0.100.102]: 553 5.7.1 : Sender address rejected: not owned by user erp@xxx; from= to= proto=ESMTP helo= 

Best Regards