Im trialing office 365 at the moment and have a domain attached to said account, the issue is that if i send an email from gmail from a web browser i get the below error, but if i send the same gmail email from within an outlook configured account the office 365 account recieves it no problem, so far all other domains i have tested ok sending and recieving from the 365 email address
any ideas, thanks in advance
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain XXXXXXXX.XXX by XXXXXX.XXX. [00.00.00.00].
The error that the other server returned was:
550-Please turn on SMTP Authentication in your mail client.
550-mail-yh0-f41.google.com [126.96.36.199]:33828 is not permitted to relay
550 through this server without authentication.