[imp] IMP Compose message

[Mac Table]

Is it possible NOT SHOW the email address at "From"
header, such as:

IMP always send out message with 
"From: Myname <myname@mydomain.com>

But I just want "From: Myname" only, without email
address show in from field.

I need this because some of my user have tow or more
identities, even they put the actual email address in
identities, but "From" field is still showing the
login email address.

Please help ... Thx!!! 

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