We use Google Apps for Businesess and 2 days ago we had our new website migrated to our new hosting account, the developers changed the DNS settings and this caused our emails to stop working.
I have tried to make a few changes but can not find out what the issue is.
MX records all appear to be correct. The email account can send emails but not receive anything. When I try to send an email to the affected account, I get the following error:
Error Message from Destination Mail Server:
550 through this server without authentication.
I need someone with experience in configuring email routing to help me out right away please.