Change Qmail Site link

README.md

@@ -333,7 +333,7 @@ _MTAs / SMTP servers_
 - [MailHog](https://github.com/mailhog/MailHog) - Small Golang executable which runs an SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development. `MIT` `Go`
 - [OpenSMTPD](https://opensmtpd.org/) - Secure SMTP server implementation from the OpenBSD project. ([Source Code](http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/smtpd/)) `ISC` `C`
 - [Postfix](http://www.postfix.org/) - Fast, easy to administer, and secure Sendmail replacement. `IPL-1.0` `C`
-- [Qmail](http://www.qmail.org/top.html) - Secure Sendmail replacement. ([Source Code](https://sources.debian.net/src/netqmail/1.06-5/)) `CC0-1.0` `C`
+- [Qmail](https://cr.yp.to/qmail.html) - Secure Sendmail replacement. ([Source Code](https://sources.debian.net/src/netqmail/1.06-5/)) `CC0-1.0` `C`
 - [Sendmail](http://www.sendmail.com/sm/open_source/) - Message transfer agent (MTA). `Sendmail` `C`
 - [Slimta](http://slimta.org) - Mail Transfer Library built on Python. ([Source Code](https://github.com/slimta/python-slimta)) `MIT` `Python`