550 5.7.1 Client does not have permissions to send as this sender

[tv_kid]

Hi there

 

I'm getting this error when trying to send an email using the plugin.  I'm successfully connecting to the smtp server, so I'm guessing that means the credentials I've passed are ok, but when I try to actually send the email I get the above error.

 

The email accounts are on a hosted Exchange Server, if that makes any difference.

 

Can anybody shed any light on this for me?

 

Much appreciated.

 

 

[wbasham]

A client of ours recently reported a similar issue with an Exchange Server (SMTP).  The resolution for them was that the user account being used to log in to the Exchange Server needed user admin rights (configured on the Exchange Server).