[Dovecot] Dovecot's as ip/user based login filter?

[Sysadmin]

Tere.
> Actually I do not know wheter Dovecot can do it by itself.
> On my server I use a customized PAM-Module to authenticate and authorize
> my users. The module also performs a check on the host where the users
> comes from and checks wheter there is a rule to allow/deny access from
> this host.
>
> I know this setup sounds an bit exotic, but it works quite nice for me
> with the advantage to use this feature within other services than dovecot.
>
>   

It's sounds wonderful. Can You kindly share this customized pam module
for me?

-- 
Sysadmin