Sendmail - Unknow User.

[akonstam at trinity.edu]

On Wed, Dec 07, 2005 at 08:13:35AM -0600, Les Mikesell wrote:
> On Wed, 2005-12-07 at 07:03, Neil Marjoram wrote:
> > I have a small problem with sendmail.
> > I have a number of students working on the configuration of some Fedora 
> > systems as part of an MSc course we run. One of them has an interesting 
> > problem I can't fathom out at all. When he sends a mail meesage to a 
> > local user he has created sendmail returns the error dsn=5.1.1, 
> > stat=User unknown. (we use command line mail to send the email) When I 
> > create a user on the same box and send a mail there is no problem. I am 
> > not sure how the student  created the user but I think it was with a 
> > command like this : useradd -c 'works clerk--Jenny Rawring' -d 
> > /workspace/home/Jenny/Jenny -s /bin/bash Jenny.
> > You can su to the user, login from outside and send a mail from the user 
> > to root, I can't find anything in the passwd etc. files that looks out 
> > of place.
> > 
> > Does anyone know anything I may have missed.
> 
> Sendmail is going to lowercase the local part of the address
> before trying to match users.  It isn't quite case insensitive,
> it accepts upper/lower in the address and wants to match
> lower in the passwd file entry.  Adduser should have given
> you an 'invalid user name error', though.
It is correct that Jenny as a user name was the problem but useradd
does not complain if Jenny is used as the user name.

-- 

-------------------------------------------
Aaron Konstam
Computer Science
Trinity University
telephone: (210)-999-7484