Todd,
Those IPs are the round-robined A records for speakeasy.net (the DNS
zone origin or @) itself. Imail tries A records (which it calls "stack
connects") after MX attempts (called "MX connects") are unsuccessful
or if it does not find MX records at all.
As your log does not show MX connects--failed nor successful---but did
get to try some stacks, the usual interpretation is that your Imail
box's DNS server is not giving out MX records for this domain, either
because of propagation/recursion problems or because they aren't
supposed to exist, but that you do have SOME name services available
(whether they're the right ones is the question).
In this case, the MXs for speakeasy.net do exist on the rootservers.
Moreover, the MXs look alive to me. So your best bet is to nslookup or
dig right into your DNS servers listed in Imail and see what they
return. Don't worry about the local HOSTS file for discrepancies,
because that wouldn't give you the round robin, but check it out while
you're at it just for additional info.
In addition, both of the speakeasy.net nameservers are serving up the
MXs to me, so...use 'em! Make sure you aren't pointing to a deprecated
DNS server at your ISP that has gone internal--a seemingly crazy idea,
but I wouldn't suggest it if I hadn't noticed that you sent your mail
THROUGH mail6.speakeasy.net, and I noticed that speakeasy.net is your
ISP, the recipient domain of your e-mails, and your mail ASP. You
might thus generate misleading MX responses since you'd be inside
their Sendmail farm where things can get hairy.
Oh, and look at this KB article for other causes involving multihomed
machines, non-routable IPs, and the like:
http://support.ipswitch.com/kb/IM-19981110-DD02.htm
Sandy
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