Campaign Delivery Log - ERRORS

[ART-Marketer]

Today I noticed that I am getting the following error for both my delivery engines. I do not see a pattern, but out of 1,000 records, over 50% were this error. Both servers validate correctly and send without issue about 50% of the time. Is this a speed issue?

Connection could not be established with host smtp.mailgun.org [Connection refused #111] Log data: ++ Starting Swift_SmtpTransport !! Connection could not be established with host smtp.mailgun.org [Connection refused #111] (code: 0)

Connection could not be established with host send.smtp.com [Connection refused #111] Log data: ++ Starting Swift_SmtpTransport !! Connection could not be established with host send.smtp.com [Connection refused #111] (code: 0)

 

[laurentiu]

@ART-Marketer - It means your smtp server isn't accepting connection on the ip/port you have used.
Contact your hosting and tell them to allow you to make outgoing connections on your port.

 

[ART-Marketer]

Thanks, but the messages are sent successfully sent with no error sometimes, just not all of the time. If the port was blocked at the host wouldn't it fail 100% of the time?

 

[Vroom]

Could be speed limits set by mailgun. Hourly quotas, minute quotas, max connections...

 

[ART-Marketer]

We increased the pause between the sends on our delivery servers and also setup additional attempts in case a connection is refused. Thanks for the feedback and advice.