Terabytes - 3:16 pm on Apr 17, 2012 (gmt 0)
Hoping that 'somebody' can give me a clue about this...
We host a mail server internally that receives mail via an MX record from our domain / host.
We switched IP addresses last night at about 8pm, and had the MX record modified to point to the new IP address.
some mail is being returned with the error 503 - bad sequence of commands, however some emails are actually making it inside.
I'm thinking that this is a DNS issue and some packets are routing to the old IP address and the email server only receives parts of the incoming email.
I've looked around online concerning the error (503) and that seems to explain the lost information...
do I just sit and give DNS a chance to propagate? it's only been 12 hours'ish...
we can send out with no issues, and normal Internet traffic from the users works fine in the new IP address..
Anybody have any ideas? is there something I might have needed to change on the email server, or something to check?
I did do a telnet in and manually sent an email in (helo, etc)... and some users can succesfully send from their hotmail accounts into the company, however my personal domain email bounces with this error, and gmail bounces back also...
any help or suggestions will be gratefully accepted..
Thanks for your valuable time!