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

To whitelist a host on a qmail install (qmailrocks in this case) do the following:

Edit /etc/tcp.smtp and add this line:

XXX.XXX.XXX.:allow,RBLSMTPD=""

Replacing XXX.XXX.XXX. with the ip of the host to be whitelisted.

Next rebuild the cdb file with:

qmailctl cdb

This first procedure prevents RBL checks on the host.

To whitelist a host or domain in spam assassin, edit vi /etc/mail/spamassassin/local.cf and add a line like this:

whitelist_from *@friendlydomain.net

With a web browser go to http://lazyinstaller.net/pages/generator.xhtml and complete the form.

Copy/paste the generated script to a text file on the target server and make executable.

Edit the script and comment out the first echo line.

Run the script.

Here's a link to a qmail faq:

http://cr.yp.to/qmail/faq.html

Don't know if it's the most recent version.

In qmail, relaying is usually controlled by the tcpserver wrapper which uses a config file at either /etc/tcp.smtp or /home/vpopmail/etc/tcp.smtp.

The config file must be compiled into a binary format - "tcp.smtp.cdb" for actual use. Here's the command line:

tcprules /etc/tcp.smtp.cdb /etc/tcp.smtp.tmp < /etc/tcp.smtp

You don't need to restart qmail after rebuilding the database.