Postfix mailcatcher configuration

postfix-mailcatcher-config.txt

# ======================  /etc/postfix/main.cf =========================

# ...
catcher_destination_recipient_limit = 1
virtual_mailbox_domains = reply.domain.com
virtual_transport = catcher
virtual_mailbox_maps =
virtual_alias_maps =
recipient_delimiter = +

# ===================== /etc/postfix/master.cf =========================

# ...
catcher   unix  -       n       n       -       -       pipe
    flags=ODRhu user=user argv=/path/to/mailcatcher.sh
        ${sender} ${user} ${extension}
        
# ===================== /path/to/mailcatcher.sh ========================

#!/bin/sh

PATH=/bin:/usr/bin:/usr/sbin

FROM="$1"
USER="$2"
CHANNEL="$3"

logger -p local0.info -t "postfix/mailcatcher[$$]" "Caught reply from $FROM to channel $CHANNEL"

exit 0