> On Jun 8, 2026, at 8:56 AM, Jaroslaw Rafa via mailop <[email protected]> 
> wrote:
> 
> Dnia  8.06.2026 o godz. 14:48:26 Slavko via mailop pisze:
>> Dňa 8. júna 2026 14:07:19 UTC používateľ Mark Stone via mailop 
>> <[email protected]> napísal:
>> 
>>> If an email really does need to be "forwarded", I've advised my customers
>>> to copy the email to the clipboard and paste it into a new email to the
>>> intended recipient (what would have been the forwardee).
>> 
>> Or use MUA capable of that...
> 
> Forwarding in MUAs (when clicking the "forward" button) generally works that
> way. It creates a new message, with you being the sender, subject copied
> from the original mail, usually with "FW:" added in the front, and either
> the contents copied from the original mail (including basic headers like
> "From:" and "To:", which are included in *body* of the new message), or the
> original mail attached as message/rfc822 MIME part (depending on the
> MUA and its configuration).
> 
> Forwarding via MUA and auto-forwarding via .forward file or aliases are two
> *completely different* things. The former creates a completely new message,
> with the user forwarding the message being the sender, the latter preserves
> the original message and sender, causing trouble for SPF/DMARC.
> 

Yeah, there's inline-forwards and forward-as-attachment, and I use those both 
heavily for doing things like spam analyis (and have had to show my coworkers 
where those options are since yeah, there's not an obvious UI icon for them).

(So, that's at least three different definitions of "Forwarding")

I imagine it's only a trivial amount of perl to basically get procmail or 
whatever to do either of these, if I needed it to, but it's absolutely not a 
wrapper that's conveniently built into sendmail that I can drop into a 
virtusertable or a .forward.  There's no mode-switch there to change the 
behavior of "[email protected] <mailto:[email protected]>" for the users.  Or 
the rules that are set up in our corporate mail server (which I think use Sieve 
under the hood).

This moves sendmail/postfix/etc from the point of being "MTA" to 
"automated/scripted MUA", but it's only one or two users who do this, and, 
honestly, it lets me keep up with the joneses.  Behavior like this affects 
users at the dayjob, even those who want to set up a vacation forward to their 
gmail for some subset of messages.

-Dan

PS: There's a youtuber I follow who reacts to things by starting, asking 
frustratedly "What is it now...?"  I must admit, I've heard that phrase echoing 
in my head lately.

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