Help: Enabling users to set up mail redirect for their email
We have an internal network with a Linux mail server (sendmail). The end users are running Win NT 4.0 with a normal SMTP/POP3-Client on their machines with which they send and receive their mail.
However, when someone is on vacancies, he needs to redirect his incoming mail to somebody else, and I wonder how that can be achieved. Right now, the administrator (that's me) can use webmin and alter the alias settings in order to perform the redirect. But the administrator having to care for that is not really a viable approach; the end users should be able to do it on their own.
Trouble is, although they have their accounts on the mail server, they are Windows users that never log into the mail server (other than POP3 through their email software). They would not be able to handle a Linux login shell in order to alter their mail settings.
Does anybody know a good approach to solve this? For instance, is there a HTTP-based tool (similar to webmin) that allows setting up an email redirect for the user's own account (without requiring admin privileges)? (How do other companies solve that when they are running a Linux mail server in a Windows environment?)