[Dovecot] Logging in with '+' delimiter

[Timo Sirainen]

On Oct 7, 2009, at 8:48 AM, Jerry wrote:

> I have Postfix configured to use Virtual Users & Domains and use
> Dovecot for virtual delivery. Postfix also sends, dovecot correctly
> places mail with '+'addressing; i.e., "foo+bar at domain.com" into
> "path-to-mail/domain.com/foo+bar".

Is this right? Typically it would be placed in mail/domain/foo/.bar/  
or something, i.e. a mailbox called" bar" for user "foo"..

> The problem is when I attempt to
> access the mailbox, the user name: foo+bar at domain.com is rejected.
>
> Is this by design, or is there a way to circumvent this problem?

You can safely add "+" to auth_username_chars setting.