We can receive but not send send email or forewards from one of our 3
identities.The other 2 work fine receiving and sending.
Error message is:
The message could not be sent because one of the recipients was rejected by
the server. The rejected e-mail address was 'bla bla @bla.net'. Subject
'test', Account: 'pop.bla.net', Server: 'smtp.bla.net', Protocol: SMTP,
Server Response: '504 XXXXXX: Sender address rejected: need fully-qualified
address', Port: 25, Secure(SSL): No, Server Error: 504, Error Number:
0x800CCC79

I have read some of the other posts and have compacted email files, deleted
Outbox.dbx and Sent.dbx for this identity. Still can't send email.Any
suggestions would be appreciated. Thanks in advance