[Alpine-info] email+TAG@domain

[via Alpine-info]

>> A possible workaround might be to add a similar option that matches on 

>> Delivered-To: headers, applies a sed(1)-style transform, and copies the 

>> result to the From: field.



> Is there any other header besides Delivered-To that has the information 

> you need? My information is that this header is defined in an 

> experimental RFC from about 3 years ago, but I do not find it in the 

> headers of the message I am replying to, so it has not been widely 

> adopted yet.


Huh.  It's been in both qmail and Postfix for more than twenty years; and 
it's been in Gmail since launch.

It also seems to be a well-known, standard answer to this kind of problem. 
There are plenty of Stack Exchange, etc, answers that mention it, going 
back for at least fifteen years.  See, e.g., 
https://webapps.stackexchange.com/questions/5719/is-it-possible-to-create-a-gmail-filter-that-works-on-headers-other-than-from-t

I had assumed it was universal.  :(

As far as I know, there isn't another usable header; and certainly not one 
that's more widely deployed than Delivered-To.


  -Jason