Changing email headers, e.g. subject line possible?

I would like to change email headers, say to add a more meaningful subject line. Any chance this works with eM Client?

I agree this is a “must have” option.

I’ve been able to do this since the late 90’s with Eudora (which I just left to move to eM Client since Eudora hasn’t been supported since 2006).

It is such a common-sense option (since customers/family, whoever sometimes have the goofiest idea of what a subject line should be and being able to modify it to my liking makes it so much easier to find/recognize mail down the road.)

DS

MUST have Option Hello EMClient!!