[Dovecot] Authentication Failure

[William J. Dzieciolowski]

Probably a newbie question.... sorry.

Did a deluser a week or so ago, but didn't remove any of the users 
files.  I re-enabled the user via useradd with the -u and set the uid 
the same as it was before.  Now when I try and log the user into his 
mail via Thunderbird, /var/log/messages reports

dovecot(pam_unix)[17259]: authentication failure; logname= uid=0 euid=0 
tty= ruser= rhost=  user=sean

Any help is appreciated.  Thanks.