search for: path_to_file_recipient_bcc

Hi, I am using Postfix and Dovecot. I have set up backup_mailbox at domain.tld, which gets mail copies from user1 at domain.tld user2 at domain.tld user3 at domain.tld, the copy option is set in postfix recipient_bcc_maps = path_to_file_recipient_bcc. In recipient_bcc file I have: user1 at domain.tld backup_mailbox at domain.tld user2 at domain.tld backup_mailbox at domain.tld user3 at domain.tld backup_mailbox at domain.tld Postfix does the job and copies user1, user2, user3 emails to backup_mailbox. But I also want to filter mails in backu...