Dear guys
I want to configure a postfix server mail with dovecot and postfwd and procmail(with a webinterface to admin postfix and create/manage mailboxes) for vacation.
The policy for user mailboxes is: user can't know the password and for activate or deactivate the vacation massage the user of mailbox need to write a mail to server (ex. vacation@mydomail.org) with subject: activate/deactivate to activate o deactivate vacation (for activation the body of mail is the message for auto-reply vacation mail).

As it, is possible?
I can't use Roundcube or comunicate credentials for login into Webmin for administration.

Best Regards

(ex.me for not perfect english)

Webmin, or better Usermin can be configured to constrain functionality by user ID.
We have one account that uses Webmin to administer all their email addresses.
They can't do anything else but maintain email accounts for their domain.
All our users can use Usermin to change passwords.

So, that's my recommendation. Learn how to, and configure Webmin or Usermin to do what you want.

Thanks for the reply.
I'm already using WebMin and UserMin for server administration but the company manager does not want to release email credentials to users. For that the "request" is that of activation or deactivation of the message by mail to the mail server (convenient for users).
it's possible to do it?