Qmail IPv6 support
Does qmail supports IPv6?
Qmail does not support IPv6 by default. The development of qmail has ended around 2003.
How can I use IPv6 transport with qmail?
There is a tool called [http://opensource.sf-tec.de/Qsmtp/ qsmtp] that replaces SMTP programs of qmail and supports IPv6 with tons of patches. You have to change your startup scripts to use Qsmtpd instead of qmail-smtpd and everything will work as before (but you will get some new features). Be careful: Qsmtpd does only look at the standard tcpserver environment variables, setting RELAYCLIENT will not work. You can use /var/qmail/control/relayclients and /var/qmail/control/relayclients6 to get the same behaviour
Qsmtp installation
What do I need to install Qsmtp?
[http://cr.yp.to/qmail.html qmail 1.03]
- IPv6 capable system (no need to have an IPv6 address or IPv6 support in kernel, but libc must know inet_pton, IN6_IS_ADDR_V4MAPPED and basic and extended IPv6 API)
[http://www.fefe.de/ucspi/ ucspi-tcp including IPv6 patches]
[http://www.fefe.de/libowfat/ libowfat (>=0.21)]
[http://www.openssl.org OpenSSL (>= 0.9.7)]
[http://www.inter7.com/index.php?page=vpopmail vpopmail (optional, but strongly encouraged)]
Then you need the Qsmtp:
[http://opensource.sf-tec.de/Qsmtp/ Qsmtp (>=0.9)]
How can I install Qmstp?
Follow the installation instruction inf Qsmtp package in doc/INSTALL.