Following on from my last journal entry where I mused over my need for the ability to modify the sender address of the envelope of a mail message with Sendmail, I have a solution - In spite of my own misgivings regarding my ability to develop in C, I have added the ability to set (modify) the sender address of a message envelope with Sendmail via the milter interface. Now to get approval to release this as a patch back to the sendmail project ...
