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Re: Which Spam Block List to use for a network?

On June 26, 2004 05:27 pm, Leonardo Boselli wrote:

> Just a note. Since these are infected machines, a first test could just to
> try to "call back" the other server, to see if it replyes to port 25.

Being unable to connect to port 25 doesn't mean anything.  AFAIK there is no 
RFC or other standard saying that to send email with smtp you must accept 
email by smtp.

It is normal (or at least common) to verify that the sender's domain at least 
appears to accept mail but a given mail relay could be dedicated to outgoing 
mail and there's no reason that it must accept mail.

Fraser Campbell <fraser@wehave.net>                 http://www.wehave.net/
Georgetown, Ontario, Canada                               Debian GNU/Linux

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