Re: uncatchable spam

On Oct 5, 2010, at 2:46 AM, JC Dill wrote:

> IMHO, the few people who are sending non-spam email from DUL listed IPs aren't worth accepting email from.  If they don't have enough clue to obtain a non-DUL IP (e.g. get a static IP from their ISP) and setup appropriate reverse DNS, odds are very high that they aren't sending anything worth receiving.  However, you may have customers who feel differently, and you may need to whitelist a few clueless senders in this category.

Aye, what she said.  We defer delivery on any message that comes from a server without a PTR in case it's a transient lookup failure.  Only issue that we've had was when one of the business CLECs got bought out by another and someone turned off the nameservers for the acquired company a few years back.  Couple of phone calls to them straightened it out.

--Chris
-- 
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