I am getting the following error below periodically when users send emails to certain domains. It is an immediate error back. I can send from an outside yahoo account to most of these domains and addresses. Sometimes they will even go thru our system correctly. I have tried doing a DNSflush but that doesn't remedy the situation. It is like a crapshoot whether they will go thru or not. Any hints or suggestions would be appreciated.
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
