<div dir="ltr"><div><br></div><div>Mike,</div><div><br></div><div>Are you using comcast's servers as your outbound MTA?</div><div><br></div>If you are a customer of Comcast then I expect you can use their outbound mail servers.<div>Configure your mta to use <a href="http://smtp.comcast.net" target="_blank">smtp.comcast.net</a> on port 587 (clear text) or 465 (TLS) as your outbound email server.<div>You'll need your comcast account username and password to authenticate to it. </div><div>You'll probably also want to decorate your SPF with details letting the net know that comcast is your relay.</div><div>Comcast will add DKIM to your message headers.</div><div><br></div><div><a href="http://customer.comcast.com/help-and-support/internet/email-client-programs-with-xfinity-email/">http://customer.comcast.com/help-and-support/internet/email-client-programs-with-xfinity-email/</a><br></div><div><a href="http://postmaster.comcast.net/outbound-mail-servers.html">http://postmaster.comcast.net/outbound-mail-servers.html</a><br></div><div><br></div><div>Of course similar things can be done using google, hotmail, mxlogic, yahoo and the rest. </div><div><br></div><div>I speak for myself</div><div>chris</div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 3, 2014 at 12:40 PM, Will <span dir="ltr"><<a href="mailto:will.sterling@gmail.com" target="_blank">will.sterling@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">You could use an external mail relay to send your mail using a 3rd companies IP space. They sound a little sketchy but cheap enough to be worth a try,<div><br></div><div><a href="http://www.dnsexit.com/Direct.sv?cmd=mailRelay" target="_blank">http://www.dnsexit.com/Direct.sv?cmd=mailRelay</a><br></div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Oct 31, 2014 at 5:08 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 dir="auto"><div>And now yahoo....</div><div><br></div><div><span style="background-color:rgba(255,255,255,0)"><span> ----- Transcript of session follows -----<br></span>... while talking to <a href="http://mta6.am0.yahoodns.net/" target="_blank">mta6.am0.yahoodns.net</a>.:<br></span><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><font color="#000000"><span style="background-color:rgba(255,255,255,0)">MAIL From:<<a href="mailto:staver@fimble.com" target="_blank">staver@fimble.com</a>> SIZE=3303</span></font></blockquote></blockquote></blockquote><span style="background-color:rgba(255,255,255,0)"><<< 421 4.7.1 [TS03] All messages from 23.31.69.157 will be permanently deferred; Retrying will NOT succeed. See <a href="http://postmaster.yahoo.com/421-ts03.html" target="_blank">http://postmaster.yahoo.com/421-ts03.html</a><br>... while talking to <a href="http://mta7.am0.yahoodns.net/" target="_blank">mta7.am0.yahoodns.net</a>.:<br></span><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><font color="#000000"><span style="background-color:rgba(255,255,255,0)">MAIL From:<<a href="mailto:staver@fimble.com" target="_blank">staver@fimble.com</a>> SIZE=3303</span></font></blockquote></blockquote></blockquote><span><font color="#888888"><br>-Mike</font></span></div><div><div><div><br>On Oct 30, 2014, at 4:31 PM, Mike Staver <<a href="mailto:staver@fimble.com" target="_blank">staver@fimble.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
Taking your advice, I did create SPF records for my server again.
Either way, that was probably long over due. Unfortunately, some
mail services which I despise for other reasons, still reject the
mail from my server:<br>
<br>
<pre> ----- Transcript of session follows -----
... while talking to <a href="http://mx1.hotmail.com" target="_blank">mx1.hotmail.com</a>.:
</pre>
<blockquote type="cite" style="color:#000000">
<blockquote type="cite" style="color:#000000">
<blockquote type="cite" style="color:#000000">
<pre>MAIL From:<a href="mailto:staver@fimble.com" target="_blank"><staver@fimble.com></a> SIZE=678
</pre>
</blockquote>
</blockquote>
</blockquote>
<pre><<< 421 RP-001 (SNT004-MC2F44) Unfortunately, some messages from 23.31.69.157 weren't sent. Please try again. We have limits for how many messages can be sent per hour and per day. You can also refer to <a href="http://mail.live.com/mail/troubleshooting.aspx#errors" target="_blank">http://mail.live.com/mail/troubleshooting.aspx#errors</a>.
... while talking to <a href="http://mx4.hotmail.com" target="_blank">mx4.hotmail.com</a>.:
Just one more reason to hate hotmail.
</pre>
<br>
<div>On 10/20/2014 4:26 PM, Quentin Hartman
wrote:<br>
</div>
<blockquote type="cite">
<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> <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?
>
> _______________________________________________
> clue mailing list: <a href="mailto:clue@cluedenver.org" target="_blank">clue@cluedenver.org</a>
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> </pre>
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