remove excision mail hompegae link (website down)

README.md

@@ -325,7 +325,7 @@ _CalDAV or CardDAV web-based clients._
 _Simple deployment of a mail server, e.g. for inexperienced or impatient admins._
 
 - [docker-mailserver](https://github.com/tomav/docker-mailserver) - Fullstack but simple mail server (smtp, imap, antispam, antivirus, etc.). Only configuration files, no SQL database. Keep it simple and versioned. Easy to deploy and upgrade. `MIT` `Docker`
-- [Excision Mail](https://excision.bsd.ac) - Fullstack, security focused mailserver based on OpenSMTPD for OpenBSD using ansible. ([Source Code](https://github.com/Excision-Mail/Excision-Mail)) `ISC` `Shell/Ansible`
+- [Excision Mail](https://github.com/Excision-Mail/Excision-Mail) - Fullstack, security focused mailserver based on OpenSMTPD for OpenBSD using ansible. `ISC` `Shell/Ansible`
 - [Inboxen](https://inboxen.org) - Inboxen is a service that provides you with an infinite number of unique inboxes. ([Source Code](https://github.com/Inboxen/Inboxen)) `GPL-3.0` `Python`
 - [homebox](https://github.com/progmaticltd/homebox) - Suite of Ansible scripts to deploy a fully functional mail server on Debian. Unobtrusive and automatic as much as possible, focusing on stability and security. `GPL-3.0` `Shell`
 - [iRedMail](http://www.iredmail.org/) - Full-featured mail server solution based on Postfix and Dovecot. ([Source Code](https://github.com/iredmail/iRedMail)) `GPL-3.0` `Shell`