I have a primary mailbox on server #2 that serves as the final destination for all of my mailboxes anywhere, most of which are hosted on my server #1. The transfer happens through 'redirect' commands in Sieve scripts. Both servers are running Ubuntu Server 16.04 LTS in a "perfect server" setup with Apache, Postfix and Dovecot. Today, I switched from amavisd to rspamd. After making that switch, I find that mail which was received by server #1 and redirected to server #2 gets processed by rspamd even if both the mail domain and the mailbox at the receiving end on server #2 are set to 'Spamfilter: not enabled', with the spam scores (X-Spamd-Bar, X-Spam-Level) adjusted and possibly the subject line edited to suddenly include the "*** SPAM ***" notice. The latter happens even though none of my rspamd-related Spamfilter policies is configured to modify the subject in any event. (I've now configured those receiving mailboxes to use the 'Uncensored' filter as a workaround.) The spam score of course always deteriorates in the process because the SPF etc. fails for most senders when the sending server is my server #1... Also, I've noted a delay of roughly seven minutes in one case for such a redirect now, while I'd usually expect them to happen near-instantaneously?