We would like to start receiving emails for a new domain
companyB.com is the default domain
domain.com has been added to the authoritative accepted domains list.
A mailbox has been created with the primary e-mail address being firstname.lastname@example.org (user@companyB.com is the secondary)
Everything is fine from inside, but cannot receive external mail.
When sending a mail to email@example.com from the outside, I get:
----- The following addresses had permanent fatal errors -----
550 5.7.1 Unable to relay for firstname.lastname@example.org
Reporting-MTA: dns; lanscreen-smtp2.lansolutions.net
Status: 5.1.1 (permanent failure)
(How come this doesn't appear to be generated from Exchange like most bounceback's Im used to seeing?)
Very grateful for any possible help!!