My name is Agustin de Landa and I have a Linux box running Red Hat Enterprise Linux ES release 3 (Taroon Update 9)
I have many users created and using sendmail with SMTP and POP3 services and all of them running OK.
Today I created a new user in the same way we have always done it in the past and for some strange reason this user is not accepted when trying to send an email to it.
We always get: Lilia.email@example.com
... User unknown
The difference I have is that all my users are created with Lower case and this particular one has the fisrt letter in Upper Case and the rest in Lower case.
Could this be the problem?
Thanks in advance.