AOL rejecting mail from IP's w/o reverse DNS ?

Robert E. Seastrom rs at seastrom.com
Wed Dec 3 17:32:32 UTC 2003


Daniel Senie <dts at senie.com> writes:

> Many will turn on a flag to specify "some PTR must exist" if AOL or
> some other large provider does it and is able to stick with it.
> 
> Yes, there'll be some work for DNS-clued consultants if that happens.
> 
> The impact on the 'net will not be all that significant, though. A few
> providers will certainly be impacted, namely those who've not bothered
> to implement (or only partially implement) INADDR.

... and it will be a zero-sum game once the spammers (or their
complicit ISPs) fix their in-addrs too.

while i applaud the notion that people will fix their dns entries,
we're long past the days where spammers could be assumed to be
clueless twits who were operating without serious technical backing.

making the presumed good guys fix their in-addrs will have the
collateral effect of getting them fixed by the spammers too.  in fact,
i wouldn't be surprised if some of the spammers who subscribe to nanog
have new to-do items on their whiteboards now.

                                        ---rob






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