I have a client that has this domain.com he has a add on domain named domain2.com.
All emails accounts on main domain work great in neomail and also outlook express sending and receiving no problems.
He has email acounts setup under the add on domain a example is firstname.lastname@example.org this account works fine in neomail sending and receiving but in outlook only receiving will not work sending mail gives couple of errors.
"relaying prohibited" and this one
An unknown error has occurred. Subject 'testing',
Account: 'test', Server: 'mail.domain.com', Protoco
l: SMTP, Port: 25, Secure(SSL): No, Error Num