Hi Stephan,
Thanks for your answer!
I use Dovecot's Pigeonhole Sieve implementation, and there is one little feature I'm missing: When a vacation message is sent, I'd like to keep a copy of that message in my "sent" mailbox.
There is an RFC draft (draft-ietf-extra-sieve-fcc-09) for this, which adds a ":fcc" argument to vacation, but apparently it's not supported by Pigeonhole.
Actually, it is RFC already: https://tools.ietf.org/html/rfc8580 .
Okay, thanks for the pointer!
I have two questions:
Will ":fcc" be supported in the future?
I'd say yes, but it is not simple to implement, nor is it high up in our list of priorities.
Okay, so I'd better look for another solution in the meantime...
In the meantime (or if supporting ":fcc" is not planned), is it possible to achieve the same result with the existing Sieve extensions? (I can imagine a way to do this at the MTA level by checking the presence of the "Auto-Submitted:" header, but did not test it.)
I can't think of any means to do that within the Sieve language.
I'll try to find a way to do it at the MTA level, but it seems more complicated than what I initially thought.
Best,
Gregory