we recently changed the address lookup from "Fullname then Local Part" to "Fullname only". It works so far but we have an issue with specific users with one specific last name.
Our Mail address is defined as "email@example.com".
The problem users have the same last name as our Domino Domain.
Example when I now try to address the users via smtp:
250 firstname.lastname@example.org... Recipient OK
550 email@example.com... No such user
I verified multiple times if the adrdess exists in the names.nsf.
So I only assume that the same domino domain and user lastname is the problem
Does anybody can help with that?