[Email-SIG] fixing the current email module

[Stephen J. Turnbull]

Barry Warsaw writes:

 > Yeah, "idempotency" probably is not the right term, though I think  
 > historically that's what's been used.  Math geeks, what's the right  
 > term here? :)

"Invertability" *is* the math term.  "Roundtrip" is more likely to make
sense to real people.

 > I completely agree with you (of course :).

Other way around, I'm sure.<wink>

What-about-the-curmudgeon-behind-the-curtain-ly y'rs,