ietf-smtp
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Re: Do we need SMTP compliance?

2005-03-10 08:51:58

Pro: Rejecting messages with errors in the SMTP commands will eliminate most spam.

The Pro argument isn't true.

Have a look at http://archive.iecc.com/article/spamtools/20050223008 or any page about greylisting. Even if the spammers' commands are correct, other aspects of their SMTP implementations appear to have certain defects.

Arnt


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