Attach Function in Sieve not available?

Wwise · Oct 10, 2023

Hello,

I wanted to build a prefilter for a mailbox in order to convert this mailbox into a simple mailing list. Only a very small circle of senders should be able to send to the distribution list (in the following example this is allowed@domain.de). If it should be another sender, he should get a corresponding notification and preferably his original mail forwarded in the attachment.
I have created the following Sieve Code for this purpose:

`require “vacation”;

if anyof (
header :contains “From” “allowed@domain.org”
) {
redirect “user1@domain1.org”;
redirect “user2@domain2.org”;
keep;
}
else {
vacation :days 99 :addresses [“list@mydomain.org”] :subject “Not allowed”
“Its not allowed for you to send to that Mailinglist”;
attach :original;
discard;
}
stop;`

Unfortunately this is not validated:

Sieve Parser: line 13: unknown command attach

Is there a workaround for that to do? Or is it not possible to do that with this sieve Version which is in the mailcow dockerized Version?

I would be very happy about help
Regards Wise

Wwise · Oct 11, 2023

I thought I had found the solution myself, because the require "attach"; had been missing at the beginning. Unfortunately the sieve version in Mailcow doesn’t seem to know this function. I get the following error message:

quoted string “attached” where require string expected

Does this function not exist with Mailcow?

Alternatively I tried “reject”. My problem is that I can’t leave the mail in the mailbox if i use reject. I would actually like the mail to stay in the mailbox with a “not allowed” flag or to be moved to an appropriate subfolder.

I would be very happy if someone could help me with this.