I have used MobileMe for 18 months with an email address on my own domain forwarded to it for inbound and sent via an external SMTP server for outbound making my @me.com address invisible.

I have just discovered that iCloud webmail has removed the ability to add an external SMTP server so sending from iCloud webmail can only appear to come from my @me.com address or an alias.

Bugger.

I don't see any workaround, do you?