Hi.
I am migrating from an old mail server to a new one (Postfix - Dovecot) and would like to use Roundcube as webmail.
I have already configured Dovecot-sieve, I know how to set up a filter from Filters panel, etc.
My old (current) mail server is using Horde as webmail and each message has a link to "Add address to blacklist - Add address to whitelist". I can't find a way to do this in Roundcube, apparently users have to copy the addresses, go to Filters and manually add them. My 4000+ users won't like that.
I know someone did what I am asking (https://techie-bee.com/how-to-block-email-on-roundcube-webmail).
Please help. Thank you.