When are messages bounced, and when not?

[gdjun]

Hello Directadmin,
I have the following issue. If i use squirrelmail to send a message to a non-existent user/address of one of the hosted domains ([email protected]), then i get a nice "Mail delivery failed: returning message to sender" reply/bounce. However if i send a mail to the same address from a mailprogram, (using a different server) then i get no reply or bounce at all.

What should happen? does directadmin/exim bounce messages for non-existing user-accounts (something like a 553 response)? or does it only bounce to local users? Here are the mainlog lines:

2010-04-12 20:47:45 H=smtp-someprovider.com [204.x.x.x] F=<[email protected]> rejected RCPT <[email protected]>:
2010-04-12 20:47:45 H=smtp-someprovider.com [204.x.x.x] incomplete transaction (RSET) from <[email protected]>

and here the loglines when sent from squirrel:

2010-04-12 20:48:51 1O1Ogl-xxx-IN <= [email protected] H=localhost (server.hostname.com) [127.0.0.1] P=esmtpa A=login:gdjun S=123 [email protected] T="test from webmail" from <[email protected]> for [email protected]
2010-04-12 20:48:51 1O1Ogl-xxx-IN ** [email protected] F=<[email protected]> R=virtual_aliases:
2010-04-12 20:48:51 1O1Ogl-yyy-Kp <= <> R=1O1Ogl-xxx-IN U=mail P=local S=321 T="Mail delivery failed: returning message to sender" from <> for [email protected]
2010-04-12 20:48:51 1O1Ogl-xxx-IN Completed

 

[nobaloney]

When sending email from your remote system through your server:

If you send an email through your server to a non-existent address on the same server you should get an error at the time you try the send.

If you send an email through your server to a non-existent address on a different server, then you should get an email back from your server with an explanatory error message.

Jeff

 

[gdjun]

Already found the culprit. Very peculiar. Problem fixed.

Long version: On my computer i send mail by smtp of my ISP but with a from address of a domain that is also hosted on the DA-server. However that domain is not yet transfered to that server. (dunno if that matters). I tested it with the webmail from the ISP and a accompanying "from" address. Yes, i got back a "Mailer notice" also tested with gmail (got the notice).
So problem probably fixed. Only a small glitch somewhere if you have a strange setup.