I have tried Tropical, SqMail and WebMailFX. The latter is the only one currently working as it should, but doesn't support anything but english standard characters (which is a problem for me and my Swedish site). None of these three are currently (since 2006) supported or maintained.

Is there anyone out there willing to create a new module for this, or that know of another module that works and is maintained? I'm running a company intranet and would like to connect the employes webmail to the site.

Hoping and wishing!
/Klas

Is it essential that it's a XOOPS module?

I'm not sure if I'm allowed to post this as it's non-XOOPS related, but there is another project called RouncCube, I really like their work, it is of course a webmail project:

http://roundcube.net

It's GPL also.

I use this for my E-mail users, it's more efficient for me, and I've never had issues with it so far, but it depends on what your looking for.

Hope this maybe of some help.

If your looking for something integrated with the one login for XOOPS, then I'm afraid I think the only solutions are those you've already tried.