I've got the following problem. Mails with an attechment are not send to their receivers. I can find them all at the SMTP spool inside the Mail Manager. As an example I've added a log file of one of these mails. This happens not only with "mx-ha03.web.de" but also with all destinations.
I don't know what's the reason of this problem.
2012-12-11 11:14:00 x@web.de R=dnslookup T=remote_smtp defer (-53): retry time not reached for any host
2012-12-11 16:21:38 mx-ha02.web.de [213.165.67.120]: Broken pipe
2012-12-11 16:21:38 x@web.de R=dnslookup T=remote_smtp defer (32): Broken pipe: mx-ha02.web.de [213.165.67.120]
2012-12-11 17:04:20 mx-ha02.web.de [213.165.67.120]: Broken pipe
2012-12-11 17:06:15 SMTP error from remote mail server after end of data: host mx-ha03.web.de [213.165.67.104]: 421 web.de Service closing transmission channel - command timeout
2012-12-11 17:06:15 x@web.de R=dnslookup T=remote_smtp defer (-46): SMTP error from remote mail server after end of data: host mx-ha03.web.de [213.165.67.104]: 421 web.de Service closing transmission channel - command timeout
2012-12-11 17:13:09 mx-ha02.web.de [213.165.67.120]: Broken pipe
2012-12-11 17:15:02 mx-ha03.web.de [213.165.67.104]: Broken pipe
2012-12-11 17:15:02 x@web.de R=dnslookup T=remote_smtp defer (32): Broken pipe: mx-ha03.web.de [213.165.67.104]
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