Maybe Rob or Jeremy can answer the "how", but I just wanted to mention to watch out pretending to be from Hotmail. Last week I sent email as a Hotmail user(not spam, this Hotmail account name was really mine) from my Fastmail account, and the GMX.net server "refused emails from Hotmail from foreign servers".
This is probably GMX protecting their users from Hotmail spam.
I do believe that if Fastmail gets so huge that that feature will become useless if it`s abused.
|