Author: David S. Madole Date: To: 'Mike Cardwell', 'exim-users@exim.org' Subject: Re: [exim] Cannot send mails to @hotmail.com addresses
> From Mike Cardwell on Friday, June 15, 2007 2:39 PM >
> I did consider that. The headers on their own don't seem to
> be a free pass, but they do help. Otherwise any old spammer
> could spam all the hotmail addresses they wanted.
Except that it's expensive for spammers to send large messages because they are sending millions. Every extra byte is multiplied by a large factor.
Likewise, it's not at all unusual for SpamAssassin installations to bypass scanning for messages over some certain size because scanning is expensive, so Hotmail is not nearly unique in this.
