[Mimedefang] How to change envelope sender?

[Tilman Schmidt]

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Am 08.05.2013 00:47, schrieb Richard Laager:
> How are you getting on the Spamcop block list?

It has been some time since I last had a problem with Spamcop
and I don't remember what the reason for the listing was in
that specific case.

Generally the most frequent causes for blacklistings of our
mailservers are:
- - abuse by the previous owner of our IPv4 address range
  (Our current /24 range was assigned to us only three years
  ago, obviously too short for some RBL operators to notice.)
- - misclassification of our IPv4 address range as dial-up
- - false claims about missing or incorrect DNS or whois entries
- - undisclosed reasons ("We have evidence but we won't show it.")
Any of these disqualifies a blacklist, of course, at least if
there is no quick and easy way to get it corrected.

Occasionally we also get blacklisted because a user account was
bruteforced and abused for spamming. That's easily corrected,
and respectable blacklists quickly delist afterwards, so it's
more of a nuisance than a problem.

But again, I haven't had a problem with Spamcop for some time
so I currently don't recommend against using it.

> Are you doing any outbound filtering?

No. German law doesn't allow that. Even inbound filtering is
legally tricky. IANAL. I think that virus scanning is acceptable,
but some lawyers even challenge that, claiming that the virus
scanner gains knowledge of the mail content, thereby violating
the constitutional right to privacy of correspondence.

T.
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