Re: blocking mail with identical 'From' and 'To' fields?

1 msg	Postfix authentication against ActiveDirectory

blocking mail with identical 'From' and 'To' fi...
\ Daniel Maher (27 Apr 2007)
. \ (Wietse Venema) (27 Apr 2007)
. . \ Roger B.A. Klorese (27 Apr 2007)
. . . \ (Wietse Venema) (27 Apr 2007)
. . . . \ Scott Kitterman (27 Apr 2007)
. . . . . \ mouss (27 Apr 2007)
. . \ Daniel Maher (27 Apr 2007)
. . . \ Reko Turja (27 Apr 2007)
. . . \ mouss (27 Apr 2007)

2 msg	address_verify_map types
11 msg	mails always get recognized as spam
4 msg	Spam/virus blocking with regexp_header?
2 msg	changing relay host to a non std port
5 msg	Possible verify.db corruption...
2 msg	search in verify.db
7 msg	Postfix Daemon status and statistics
5 msg	Discard instead of logging
5 msg	[/var/lib/imap/socket/lmtp]: Permission denied
3 msg	Postfix - Active Directory
3 msg	User unknown in local recipient table
2 msg	mail address begins with a hyphen.
2 msg	filtering mail to subdomains?
3 msg	mailing list software
4 msg	sles 10 postfix
5 msg	canonical rewrite not happening
2 msg	'Proxy' mail server for MX
2 msg	Postfix upgrade failure

Subject:	Re: blocking mail with identical 'From' and 'To' fields?
Group:	Postfix-users
From:	mouss
Date:	27 Apr 2007

Daniel Maher wrote:
>> I expect this would raise many false alarms. Surely, I am not the
>> only person who includes themselves as a recipient when sending
>> mail to someone else?
>>
>> There must be better ways to flag mail as spam.
>>
>> Wietse
>>
>
> Hehe, fair enough. In this instance, it would actually be quite strange. Any time a user would email to themselves, they would be doing so _internally_, so that their mail would never pass our border mail system.
>
> If a mail comes from the Internet, with the sender and recipient as the sole - and identical - members, then it is, beyond the shadow of any doubt, spam (again, in this instance).
>
>

you should pay attention to the

There must be better ways to flag mail as spam

part.

if you can stop spam using safe rules, there is no point looking for
bogus criteria. show a sample mail transaction for that spam and we'll
see if it can get rejected.