There is no ability to add a Gmail account in Mailwatch 1.0.1. This also effects the version I downloaded and installed from SVN on 12-1-06. I am reporting this as a bug because the functionality is stated to be part of the plugin. When I go into Properties and click on the Add button, Gmail is not one of the options listed. I am running Vectorlinux and have confirmed this bug with at least one other user on their forum.
Gmail support requires gnutls.
This was Vectorlinux 5.8 rc3. Gnutls is installed.
Please examine the output of 'configure' for clues, and attach config.log above. If Vectorlinux is a binary distro, make sure that you have the appropriate gnutls-dev package (or whatever) installed.
My assumption here is that you're using an unsupported version of gnutls, or you don't have the appropriate gnutls-dev package installed. It does indeed work, so you'll need to examine configure output and/or config.log to figure out why it's not working on your system.