I have a little problem and I don't know what to do any more.
I've changed my Hosintg provider (about 15 days ago) and I've migrated 15 sites of my clients.
All the sites are running ok and email accounts also in almost all clients, but in two of them some emails aren't received.
I mean... I've several free emails accounts from different providers and when I send an email for firstname.lastname@example.org some aren't received (the error that I receive is that the email could not be delivered cause it's pointing to the old IP and that server doesn't exist anymore).
Since the changes ocurred about 15 days all DNS should be propagate now.
I don't understand what's happening and I don't know what to do anymore.
I'll appreciate any help.
Thanks in advance!