[clue] SMTP Question

[Ryan Naef]

Mike,
Do you happen to have PTR records in place to the domain you are sending from?

Regards,
Ryan Naef
Systems Administrator
Web Development

Direct: (303) 532-4536, (303) 682-3621
Toll Free: (866) 764-8324
Fax: (877) 495-9165
Email:rnaef at aspdd.com
Web: aspdd.com

This message and accompanying documents are covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, and contain information intended for the specified individual(s) only. This information is confidential. If you are not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, copying, or the taking of any action based on the contents of this information is strictly prohibited. If you have received this communication in error or wish to be removed from the Email list, please notify us immediately by e-mail, and delete the original message.


-----Original Message-----
From: clue-bounces at cluedenver.org [mailto:clue-bounces at cluedenver.org] On Behalf Of Mike Staver
Sent: Saturday, October 18, 2014 8:01 PM
To: CLUE's mailing list
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 mx5.oit.ohio.edu.:
<<< 554-mx5.oit.ohio.edu
<<< 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 mx1.oit.ohio.edu.:
<<< 554-mx1.oit.ohio.edu
<<< 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: clue at cluedenver.org
For information, account preferences, or to unsubscribe see:
http://cluedenver.org/mailman/listinfo/clue