1
Delivery Failure
Problem reported by Vahn Babigian - September 30, 2016 at 4:50 PM
Known
Since updating to Version 15.3.6109 we are having problems with email to all aol.com accounts and the occasional hotmail account.

Nothing has changed except for the update. I have looked at a couple of threads posted here but they do not lead to a solution. We are not blacklisted with AOL.

I have sent emails from outside our system to the same email address with no issues.

We are getting the following delivery failure errors. 

Failed Recipient: user@aol.com
Reason: Remote host said: 601 Failed to connect to the recipients mail server.  No MX records were found for the 'aol.com' domain.
Status: 544 5.4.4 Host not found (not in DNS).Attempted to send the message to the following ip's: 
	64.12.79.57

5 Replies

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0
Linda Pagillo Replied
October 3, 2016 at 8:59 AM
Hi Vahn. In my experience, the 601 error is usually due to a DNS issue. What DNS servers are you using in your SmarterMail setup?
Linda Pagillo
Mail's Best Friend
Email: linda.pagillo@mailsbestfriend.com
Web: www.mailsbestfriend.com
0
Vahn Babigian Replied
October 3, 2016 at 9:52 AM
We use our broadband providers DNS ip addresses 64.60.0.17, 64.60.0.18.
0
Linda Pagillo Replied
October 3, 2016 at 10:49 AM
Just as a test, please change those to Google's DNS servers which are 8,8,8,8 and 8.8.4.4. Once you do that, try to force send those messages again from your Spool. If they are delivered then you know your DNS provider is having issues, Thanks.
Linda Pagillo
Mail's Best Friend
Email: linda.pagillo@mailsbestfriend.com
Web: www.mailsbestfriend.com
0
Vahn Babigian Replied
October 3, 2016 at 11:10 AM
I changed the DNS addressed to Google as you suggested and the emails just flew out of the message queue. 
 
I have contact my broadband provider for a fix. 
 
Is there any downside that you are aware of if I keep using Google DNS until my provider fixes the problem, if they can fix it?
2
Bruce Barnes Replied
October 3, 2016 at 3:43 PM
And do not cache DNS, it becomes poisoned too easily.
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting

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