methods for ETRN

[jyoung]

Some of our clients use ETRN to get their mail. I'm wondering what are my
choices of solutions to implement this feature into qmail. The only thing I
have found is at http://defiant.cqc.com/~pacman/projects/qmail-etrn/. Is
anyone using this? If so, how's it working for you?

Any and all solutions are appreciated.

Thanks.

John

addendum:

The services they use are MS Exchange, or the interjet, etc..

I'm running qmail on Redhat 6.0