Unable to send email deliveries from ACC instance

[#1]

Hi,

I recently set up ACC within an AWS ec2 instance. Also set up postfix on this which is working. However, when creating a delivery within the ACC console the email delivery is showing as sent but is never received. The relay I set up seems to be working as I am seeing the successful connection within maillog, mta logs and mta child logs. From searching the only clue I have at the moment is the following error in my mta child log: 

2020-05-01 18:26:31.603Z	00000FC4	00000FC4	  1	info	log	Starting an MTA child (pid=4036, tid=4036)...
2020-05-01 18:26:35.761Z	00000FC4	00000FC4	  1	info	log	MTA-740014 '<removed email>' sent
2020-05-01 18:26:41.720Z	00000FC4	00000FC4	  1	error	log	IOB-090007 Network error (recv(), errno=2: No such file or directory) (iRc=-61)
2020-05-01 18:28:02.725Z	00000FC4	00000FC4	  1	info	log	MTA-740013 Message(s) waiting: 0, active session(s): 0.
2020-05-01 18:28:02.725Z	00000FC4	00000FC4	  1	info	log	Stopping MTA child (pid=4036, tid=4036)...

 I've searched around and can't seem to find solutions by going through my config files or anything online. I can provide more info on my config files if needed.

Any help would be appreciated, thanks!

[#2 · Accepted solution]

Forgot to update this thread with the answer we found. Turns out all it took was unchecking a box within the delivery template properties "Test SMTP delivery". We continue to get the same error messages but they do not appear to affect our deliveries in any way.

[liamb97009872]

Hello Liam,

The log 

log	MTA-740014 '<removedemail>' sent

indicate that the message has been sent successfully assuming this is the email you sent the email to.

Now there are in broad 2 reasons for an email not reaching the user.

1. Landing in spam / junk folder - have you ruled this out that the email is not in spam

2. Can be blocked by ISP/ Mail provider / Spam filters - If this is an internal org domain try with a public domain like gmail.com or hotmail.com and if you get the email on them , check with IT to see if communications from the relay server are getting blocked.

Regards,

Adhiyan 

[liamb97009872]

Thanks for the reply. I updated this thread with a post containing our answer. Turns out we had the "Test SMTP delivery" box checked under the delivery template properties.