I am configuring sendmail(oof) for the umpteenth time on an internet server.
My MX record is pointing at mail.my.domain
Sendmail can and does accept mail for mail.my.domain
Sendmail is configured to masquerade as firstname.lastname@example.org
Sendmail refuses mail sent to email@example.com
The error message I receive when sending a message to firstname.lastname@example.org is:
x.w.y.z does not like recipient.
Remote host said: 550 5.7.1 <email@example.com>... Relaying denied. Proper authentication required.
Giving up on x.w.y.z.
Can someone give me a cluestick?