Is there a known workaround for users who want to use the old recipient delimiter plus sign method of sorting their mail? eg: foo.bat +dovecot@example.com foe.blow%2Bdovecot@example.com
This does not work with postfix/dovecot, but if we tell postfix/system-passwd to use the recipient_delimiter = + it works just like I recall sendmail did, but we no longer use local users only virtual dovecot LDA w/mysql.
postfix appears to accept it testing by telnet, but then the message gets a new DSN generated saying no user, so dovecot LDA must not work by default with this.
Postfix 2.8.3 Dovecot 1.2.17 MySQL 5.5.12
our postfix master.cf is dovecot unix - n n - - pipe flags=DRhu user=mail:mail argv=/usr/libexec/dovecot/deliver -e -d ${recipient}