Support of "extlists" in sieve filters

[Marcin Bajer]

Hi all,

Don’t really know if this is sth. to post on this forum, but I tried
to make a sieve filter which tags mails from my contacts by the
category of the contact. Seems this feature is available in
Protonmail:

https://protonmail.com/support/knowledge-base/sieve-advanced-custom-filters/

require [“fileinto”, “extlists”];

Checks that the sender is in your personal address book

if header :list “from” “:addrbook:personal?label=Family”
{
fileinto “Known”;
}

Would it be possible to implement such feature also in dovecot?

BR,
Marcin