Emails to apps without recvmail addon must bounce
Currently, they don't bounce as they are accepted by the mail server.
changed title from Emails to app without recvmail addon must bounce to Emails to apps without recvmail addon must bounceToggle commit list
This needs to work with our catch-all feature
A catch-all may be preferable to a bounce for better deliverability. My understanding is that a receiving mail server will request from the sending server whether the sending address is valid. If the response is negative, the email message will often get flagged as spam. I'm guessing that whatever would be done to reject a message (and force a bounce) would have the same effect on deliverability. As such I think it would be detrimental, whereas a catch-all would not create this new problem. Thanks for looking into this!