🚀 go-pugleaf

According to dhuber@autelca.ascom.ch (Daniel Huber):
>I just recommended a colleauge to enable the header Return-Receipt-To: for
>his outgoing international mail. However, we do not get all return receipts
>we would expect... 
>Is it possible to turn off Return-Receipt-To: replies? Or is the internet
>that unreliable?

I hate to tell you this, but there is no such thing as a
return-receipt-to header.

Well, actually there is, but it was invented by the author of
sendmail, and only sendmail (and some versions of SCO MMDF)
support the the generation of return receipts.  So the only
time you will get a return receipt is when the recipient's
machine is running sendmail.

Of course, through judicious use of the .forward file and mail
filtering programs, the fact that you got a return receipt
doesn't mean anything any way, since the addressee may be
discarding mail from you unseen.

- David