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