On 8. Feb 2022, at 3.59, Hadmut Danisch <hadmut@danisch.de> wrote:

I found that dovecot's sieve has some database connections, e.g. LDAP or

https://doc.dovecot.org/configuration_manual/sieve/dict/

but rather to receive the whole sieve script for a given recipient as the owner of the mailbox.


Is there a way to determine the target folder where to drop a mail into quickly by the sender's address, even for thousands, without the need to compare every single one of them?