I had a small issue with an email address recently, after a few changes of MX records with the help from my hosting company these were resolved.
I have tested the email address from multiple accounts, my server, gmail, aol, hotmail etc.
I have tested the MX records using a look-up service - and they are the correct records given to me by my hosting company.
However, I have been told some users are still getting emails bounced back to them, I am soon to find out the exact errors (I will have to wait a couple of days to get these).
Is there a tool I can use to test the email address that is more advanced than a MX lookup record - perhaps a way of pinging it from different servers and seeing what the response is.
The changes to the MX records were made over 48 hours ago - I am assuming that should be plenty of time to avoid email bouncing back.
Any tips and tools or article links are much appreciated.