config?

[Disk Wizzard <teck @ devco . ca>]

Hello all

 Im getting an x mailer error.... 

X-Authentication-Warning: www.devco.ca: Unknown UID 123 set sender to
owner-Netnews@devco.ca using -f

 I can remember seeing something about the cause of this in one of the docs
i have looked at but i cant find it now that i need it?:)

how do i get it fixed??

thanks