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<<TableOfContents>>

= 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}}}.