[Exim] Which is the correct envelope-to header behaviour

Say I have the valiases file for a domain as:

a@???: y_a
b@???: y_b
*: y_b

Now if i send the same mail addressed to a@???, b@??? and c@???:

1. How many distinct deliveries are going to be done? My guess is two -
one to y_a and one to y_b.

2. What are the Envelope-To: addresses of these deliveries going to be?
    a) Are they going to be the same i.e. "a@???, b@??? and
c@???". Or b) are they going to be different for the two deliveries
          i.e. y_a getting Envelope-To: a@???,
          and, y_b getting Envelope-To: b@???, c@???

TIA,
Sandip


--
Sandip Bhattacharya
sandip (at) puroga.com
http://www.sandipb.net

GPG: 51A4 6C57 4BC6 8C82 6A65 AE78 B1A1 2280 A129 0FF3