[Dovecot] pop3-login: auth failure -- due to number as first character in login name

[Timo Sirainen]

On Tue, 2010-04-27 at 16:44 -0700, dovecot mail list account wrote:
> Seem to have found a error in version 1.2.6 regarding usernames having a number as the first character. Customers with a number as the first character in thier user name can not login via pop3 clients. However they can login through our webmail interface. If we remove the number from the username then the customer can login.

Set auth_debug=yes. What does Dovecot log when such user tries to log
in? It's possible that the bug is in PAM/NSS plugin instead of Dovecot,
anyway most likely some code somewhere assumes that if name begins with
a digit it's UID number rather than username.

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