<div dir="ltr">When I've had similar problems, the SPF records did seem to fix the problem, so my anecdotal evidence suggests that most systems look for SPF before consulting IP blacklists.<div><br></div><div>Q</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Oct 20, 2014 at 3:58 PM, Mike Staver <span dir="ltr"><<a href="mailto:staver@fimble.com" target="_blank">staver@fimble.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Thanks Jim. I was afraid you were going to say that :) What I
realized is that I could set up SPF records and see if that helps
any, but I'm not sure how many ISPs pay attention to those. <br><div><div class="h5">
<br>
<div>On 10/19/2014 9:48 AM, Jim Ockers
wrote:<br>
</div>
<blockquote type="cite">
<pre style="white-space:-moz-pre-wrap;white-space:-pre-wrap;white-space:-o-pre-wrap;white-space:pre-wrap;word-wrap:break-word">Hi Mike,</pre>
<pre style="white-space:-moz-pre-wrap;white-space:-pre-wrap;white-space:-o-pre-wrap;white-space:pre-wrap;word-wrap:break-word">This doesn't really help you but I had to move my SMTP origin to an IP address outside of Comcast because their IPs are a bad neighborhood with regards to spam. I found I simply couldn't use it for e-mailing anything important.</pre>
<pre style="white-space:-moz-pre-wrap;white-space:-pre-wrap;white-space:-o-pre-wrap;white-space:pre-wrap;word-wrap:break-word">It may be getting better now that they filter port 25 and require all outgoing SMTP to go through their mail relay, but the netblocks are still known to be end-user/consumer IPs and will be on various blacklists.</pre>
<pre style="white-space:-moz-pre-wrap;white-space:-pre-wrap;white-space:-o-pre-wrap;white-space:pre-wrap;word-wrap:break-word">Can you get a virtual server somewhere else that's in a more respectable neighborhood? That's what I did...</pre>
<pre style="white-space:-moz-pre-wrap;white-space:-pre-wrap;white-space:-o-pre-wrap;white-space:pre-wrap;word-wrap:break-word">Jim
--
Jim Ockers, P.E., P.Eng. (<a href="mailto:ockers@ockers.net" target="_blank">ockers@ockers.net</a> <mailto:<a href="mailto:ockers@ockers.net" target="_blank">ockers@ockers.net</a>>)
Contact info:<a href="http://www.ockers.net" target="_blank">http://www.ockers.net</a>/ <<a href="http://www.ockers.net/%3E" target="_blank">http://www.ockers.net/></a>;
-----Original message-----
> From:Mike Staver <<a href="mailto:staver@fimble.com" target="_blank">staver@fimble.com</a>>
> Sent: Saturday 18th October 2014 19:01
> To: CLUE's mailing list <<a href="mailto:clue@cluedenver.org" target="_blank">clue@cluedenver.org</a>>
> Subject: [clue] SMTP Question
>
> Does anybody else here run their own SMTP server on Comcast Business by
> chance? I'm currently running CentOS 6.X and have run my own mail server
> for the past 20 years or so. I have never, ever had a problem with
> people not able to get my emails. Over the last month, I've had many
> cases of people not getting my emails anymore. The accounts are on
> services including but not limited to:
>
> Gmail
> Hotmail
> Yahoo
> Random college mail servers
>
> An example of a bounce back I got this evening:
>
> ... while talking to <a href="http://mx5.oit.ohio.edu" target="_blank">mx5.oit.ohio.edu</a>.:
> <<< <a href="http://554-mx5.oit.ohio.edu" target="_blank">554-mx5.oit.ohio.edu</a>
> <<< 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
> ... while talking to <a href="http://mx1.oit.ohio.edu" target="_blank">mx1.oit.ohio.edu</a>.:
> <<< <a href="http://554-mx1.oit.ohio.edu" target="_blank">554-mx1.oit.ohio.edu</a>
> <<< 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
> 554 5.0.0 Service unavailable
>
> I've checked, and my mail server is NOT listed on any spam blacklists. I
> now have to help my own mother who uses gmail get my email by directing
> her to go to her junk folder and click "This is not junk" on my emails.
> I can't tell you how much that frustrates me. The only reason I can
> think that this is happening is because I use Comcast Business for my
> ISP. Besides switching ISPs, is there anything I can do?
>
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> </pre>
<br>
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