incomplete functionality for Return-Path(MAIL FROM) handling

[grigorijski]

Currently it is possible to setup MAIL FROM address (Return-Path) using "Sender" header. But in this case "Sender" header also is passed together with other headers in DATA block and is received by message recepient, which should not be the case.

Propose that separate header must be used for "Return-Path" setting so only "Return-Path" or both "Return-Path"/"Sender" could be setup

[wneessen]

Unfortunately this won't be fixed since the maintainer has sadly passed away.

You might want to consider checking wneessen/go-mail instead.