I have a server serving running ucs for domain xxx.org.
My partner however has a second mailbox on it for sending mail on behalf of firstname.lastname@example.org.
There is a SPF record for my server so sending is completely legal.
To have the email address email@example.com working, I had te create a local domain yyy.org.
The problem is now that I don’t know how to send email to firstname.lastname@example.org because my server wants to handle this local.
Where am I going wrong? Thank you in advance.