Enable/Disable mailuser login, per user

[madmucho]

I missing functionality for some users, i want deny them acces to mailuser web page, but some from same domain is ok they can have acces there..

I think some checkbox in site user managment.

if site have mailuser login then in user managment show checkbox :-)
else dont show it.

and change this check in sql query against database table where users is stored. if flag is set ok, if not then deny and write "Acces deny"