#5.5.0 smtp;553 sorry, that domain isn't allowed to be relayed thru th 2

[rwaters]

I have a few users that get the following message when sending to select customers. Anyone know how to fix this?

#5.5.0 smtp;553 sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1)

 

[minxca]

contact the recipient admin

 

[PurdueTNT]

You might also want to check that the outgoing server is authenticated to before trying send mail. I ran into a prob like this a couple of months ago with a similar error.