I'm trying to get our old rhel3 servers relaying out with sendmail 8.13.1
I have followed amazon's guide here: http://docs.aws.amazon.com/ses/latest/DeveloperGuide/sendmail.html
But it seems the server does not authenticate correctly with amazon, the bounced back email states a "<<< 530 Must issue a STARTTLS command first" – as in something is not happing in the correct order.
My sendmail.mc: http://pastebin.com/k0Y1s6pZ
Any help is appreciated
Best Answer
The issue was resoved after we discovered that the EDGE Cisco ASA did some packet inspection on the SMTP steam, and removing the STARTTLS completely