On Wed, 18 Sep 2013, Kris Deugau wrote:

Which MTA is this?

There is an indication after another hop, between Netcarrier machines, that its qmail.

Postfix and sendmail I'm sure (and Exim probably) would create:

Received: from drone048.ral.icpbounce.com (drone048.ral.icpbounce.com
       [66.162.193.229]) by spamfilter.netcarrier.com
       ...(etc)

qmail, as best I can recall, doesn't include rDNS in its Received:
headers (although there's probably a patch somewhere out there to do so)

So maybe that's the cause.

When I execute "host 66.162.193.229":

229.193.162.66.in-addr.arpa domain name pointer drone048.ral.icpbounce.com.

Why does SA think there is no RDNS for 66.162.193.229?

SA does not look this information up (IIRC there have been a few debates about whether it should or not), so if it's missing from the Received: header, SA won't have it.

OK, I understand now. Thanks.

--
Art Greenberg
a...@eclipse.net

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