dovecot - Apr 2020 - sieve question

Hi,

We are trying to auto-reply to emails that still use one of our old 
domains. To do this, I have setup a catch-all mailbox for anything sent 
to that old domain using postfix virtual:

@old.domain.com      catch-all at new.domain.com

Then I defined a sieve script for catch-all at new.domain.com, like:
> require ["vacation"];
> if allof ( not exists ["list-help", "list-unsubscribe",
"list-subscribe", "list-owner", "list-post",
"list-archive", "list-id", "Mailing-List"] )
> 
> { vacation text:
> This message is sent automatically, and your message has NOT been read nor
forwarded.
> 
> Please update your addressbooks!
> 
> All the best! :-)
> .
> ;
> }
However, sieve never sends any auto-reply, because it logs:
> discarding vacation response for implicitly delivered message; no
> known (envelope) recipient address found in message headers
> (recipient=<catch-all at new.domain.com>, and no additional
`:addresses'
> are specified)
I have googled this, but adding :addresses in this case will not work, 
as we are trying to answer (basically) emails sent to any email 
addresses sent to that domain, and thus I cannot define specific :addresses

Can anyone suggest what to do here?

Thanks and stay healthy!

MJ

* mj:
> Can anyone suggest what to do here?
I suggest you don't use Sieve for this, but simply configure Postfix
to reject messages to @old.domain.com with the desired message. MTA
rejections signal clearly that the message has not been delivered, and
you can also include an URL pointing to a web page with more detailed
information.

-Ralph

Hi Ralph!

Thanks for your reply!

On 4/20/20 12:19 PM, Ralph Seichter wrote:
> I suggest you don't use Sieve for this, but simply configure Postfix
> to reject messages to @old.domain.com with the desired message. MTA
> rejections signal clearly that the message has not been delivered, and
> you can also include an URL pointing to a web page with more detailed
> information.
However, this means those emails are not actually delivered anymore.

For now, I would like them to *be* delivered, so we still have them in 
case something important comes in.

Your postfix suggestion would be my next step, in a couple of months 
perhaps.

Hopefully someone has a suggestion for my sieve script.

Thanks again,
MJ