Amazon SES SMTP Connection timed out
I have been trying to set up an email notification for my application using Sendmail along with SES on CentOS 6.5. As per AWS document, I have configured sendmail with SES,
The maillog says,
sendmail[29711]: s2QFCjnu027924: to=<[email protected]>, delay=00:52:09, xdelay=00:08:00, mailer=relay, pri=210717, relay=email-smtp.us-east-1.amazonaws.com [107.20.142.169], dsn=4.0.0, stat=Deferred: Connection timed out with email-smtp.us-east-1.amazonaws.com
All mails are being added in mailq
# sendmail -v -q
Running /var/spool/mqueue/s2QFueiS001965 (sequence 1 of 21)
<[email protected]> Connecting to email-smtp.us-east-1.amazonaws.com port 25 via relay.
^C
Also, I unable to do telnet to the smtp address,
# telnet email-smtp.us-east-1.amazonaws.com 25
Trying 23.21.252.142...
^C
But nmap shows port smtp (25) is open and listening,
# nmap -p 25 localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2014-03-26 17:09 CET
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000080s latency).
PORT STATE SERVICE
25/tcp open smtp
Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds
netstat output,
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 29708/sendmail
I have tried with EU region smtp email-smtp.eu-west-1.amazonaws.com as well, getting the same result.
There is no selinux and iptables running and security group rules are fine with EC2.
Any help would be highly appreciated !!
Answer
I was having trouble with the timeout as well. I didn't have any vpc subnet routing as thiyagu114 said was his issue, and none of clement's suggestions helped.
Found this on the Amazon info:
Important Elastic Compute Cloud (EC2) throttles email traffic over port 25 by default. To avoid timeouts when sending email through the SMTP endpoint from EC2, use a different port (587 or 2587) or fill out a Request to Remove Email Sending Limitations to remove the throttle.
So switching from port 25 to 587 fixed the timeout issue for me.