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We currently have our dynamic IP address blocks listed with spamhaus [through their PBL] and with MAPS [in their DUL].
We have a customer sending mail through our server to another recipient...pretty standard stuff. Here is what my logs are saying:
*our server getting the message*
2009-06-25_10-00.log:10:30:47.981 2 SMTPI-269182([216.26.223.110]) [2612154] received, 4518 bytes
2009-06-25_10-00.log:10:30:47.981 4 SMTPI-269182([216.26.223.110]) rsp: 250 2612154 message accepted for delivery
*our server sending the message*
2009-06-25_10-00.log:10:30:48.268 4 SMTP-015270(on.sja.ca) [2612154] sending
2009-06-25_10-00.log:10:30:49.060 1 SMTP-015270(on.sja.ca) [2612154] message body rejected, got:554 mail from 216.26.223.110 refused, see http://www.spamhaus.org
It appears that the server on.sja.ca is doing some sort of 'deep scanning' of the received headers and rejecting an email if the email in question has originated on any computer with an IP address listed in a blacklist/policy list somewhere. This seems to completely defeat the usefulness of these lists. The IP is not on any other blacklist at www.spamhaus.org, only the PBL.
Has anyone else experienced this recently? It happened with another server a few weeks ago. These people must be rejecting legitimate email all over the place if they will not accept an email that has touched a dynamic IP address.
--
Jeff Wark
TBayTel Internet
807-625-3041
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