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| Subject: | Re: Mail Servers blocking BAD Helo |
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| Date: | Thu, 30 Dec 2004 18:20:42 -0200 |
Hello Brandon I faced a similar problem, for a long time I managed ISPs and we decided to use Qmail ( www.qmail.org ) with SPAMCONTROL ( http://www.fehcom.de/qmail/qmail.html ) as our SMTP server. SMPT RFC says that HELO field must be the FQHN, but when you are working with "windows" customers you have a problem ( another one ) . Outlook Express send HELO as the "Machine's name". So we decided do not DNS Lookup for the HELO/EHLO greeting, but use a good and well done blocklist ( badhelo ) with regex. This way we can block some kind of virus, automated Spam programs and thinks like you tell, just including another line on badhelo file. Fernando Amatte
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