> However, note that you don't need to add all the IPs of all their > mailservers, or all the IPs in their MX records -- just the IPs of the > mailserver(s) that act as a backup for you.
One example: Received: from mx11.web.de [217.72.192.170] by hama.de with ESMTP (SMTPD32-6.06) id AAC53EAC02A6; Tue, 29 Jul 2003 00:59:17 +0200
So the IP (217.72.192.170) might actually be one of many different IPs? That is very unusual. If they only accept E-mail to one IP, it would be much more logical for them to send from that same IP.
But if it really is the case that they have 30-40 different IPs that the mail may be coming from, my recommendation would be to remove them from the MX record. Even if Declude JunkMail could support that many backup IPs, it would still require a lot of time to keep up with changes to them.
-Scott
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