Sendmail - Unknow User.

[Neil Marjoram]

Great thanks everyone, it's the uppercase letter in the user name, I did 
test this before posting by creating first one user called neil and it 
was OK, then I created a user called Neil, and that was OK, but it 
wasn't because it had sent this to the first username. -DOH.

Incidently useradd does not complain about the uppercase letter.

All the guys on our MSc course have never touched a Linux box before, 
they are all M$ people. Shame, they all have good degrees in Comp Sci 
from good uni's what are we teaching these days!

Many thanks to everyone,

Neil.

akonstam at trinity.edu wrote:

>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.
>
>  
>

-- 
Neil Marjoram
Systems Manager
Adastral Park Campus
University College London
Ross Building
Adastral Park
Martlesham Heath
Ipswich - Suffolk
IP5 3RE


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