[aklug] Re: Check my headers (I.P. blacklisted)

* Kevin Miller <atftb2@alaska.net> [150403 20:23]:
> Send an email directly to me at my work address so it doesn't get
> filtered via the mailing list: "kevin . miller@juneau.org" (slightly
> munged to thwart robo-harvesting) - I'll see what our spam filters do
> with it. I don't use spamrat so it should come through fine unless
> there's another issue.
>
> Be sure to send via the mail server that you're having issues with.
Done.
> Looking at your headers, you're saying your host is tj49.com, but the IP
> resolves to "191-232-4-64.mtaonline.net" so it looks to a mail server
> that you're forging your hostname. They should match.
>
> Received: from tj49.com (191-232-4-64.mtaonline.net [64.4.232.191])
> by lib.uaa.alaska.edu (Postfix) with ESMTP id AB3B460E31
> for <aklug@aklug.org>; Fri, 3 Apr 2015 11:59:30 -0800 (AKDT)
>
> A common practice is to name an outbound mail server something like
> smtp.tj49.com. Configure postfix to identify itself as that during the
> initial connection (HELO/EHLO). Then make sure you have an A record and
> a PTR record in DNS for your hostname. Do not use a CNAME.
>
> The other option is to configure your postfix to authenticate to your
> ISPs mailhost, and use it as a smarthost to relay from your server to
> the rest of the world.
  As you will see, I have included some lines from main.cnf, but I
  might ask for you guidance in how to do that.
  thanks
> BTW, you could reduce the number of NS lookups against your SPF record
> by changing it to just:
> "v=spf1 ip4:74.220.215.66 ?all"
> It's a minor nit. If 74.220.215.66 is the only server that you send
> mail through, it's a bit more efficient as it only has to do one lookup.
> You're probably safe to change the ?all to a ~all or even -all if that
> host is the only one sending as akwebsoft.com or tj49.com...
>
> ...Kevin
> --
> Kevin Miller - http://www.alaska.net/~atftb
> Juneau, Alaska
> In a recent survey, 7 out of 10 hard drives preferred Linux
> Registered Linux User No: 307357, http://linuxcounter.net
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>

-- 
Tim 
tim at tee jay forty nine dot com or akwebsoft dot com
http://www.akwebsoft.com, http://www.tj49.com
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