Here's an idea put to me today: Let's say someone has domain X which isn't hosted with DH. Can we setup an instance of SquirelMail (SM) in our hosted space which allows people to get their email from that other host X?
Example of use: A friend says "I get my mail for X.com using Outlook but I want to ditch Outlook and start getting my email via my browser." To help them out I might setup an instance of SM at friend1.mydomain.com and configure it to point to their server. Then another friend who has email with Y.com says the same thing. Rather than setup a completely new instance of SM, I'd rather set a config file in friend2.mydomain.com and use the same SM installation. The thing is that neither domain X nor Y are hosted here.
And, errr, is there already a service like this? Seems like there should be.
Any better options for this than SM?