I know this is a bit of an old thread but I was searching and could only find this.
We use Zimbra in an deaf organisation, so the ability to be able to use our native language (British Sign Language) would be a massive boon for us.
Failing that, I'm just as happy to use a video email either, but can't seem to find anything for that although could imagine it making use of Riffly.com or something similar to do that.
Cheers |