Reliable Penguin

To cleanly handle double bounces:

1. Create a dot-qmail file at /var/qmail/mailnames/yourdomain.com/.qmail-doublebounce containing:

|exit 0

2. Route double bounces to this file:

echo yourdomain.com > /var/qmail/control/doublebouncehost
echo doublebounce > /var/qmail/control/doublebounceto