One-way MEPs over one-way transports
SOAP MEPs without in-optional out
"ACK required" => "no reply required"
Value of distinguishing MEPs
In-optional out
Can't make this week, what do you guys want to do?
- RE: Can't make this week, what do you guys want to do?
 - RE: Can't make this week, what do you guys want to do?
 
Ueber-MEPs and points North
- RE: Ueber-MEPs and points North
 - Re: Ueber-MEPs and points North
 - RE: Ueber-MEPs and points North
 - RE: Ueber-MEPs and points North