Update README

README.md

@@ -44,6 +44,8 @@ Using this playbook, you can get the following services configured on your serve
 
 - (optional) the [matrix-appservice-discord](https://github.com/Half-Shot/matrix-appservice-discord) bridge for bridging your Matrix server to [Discord](https://discordapp.com/)
 
+- (optional) [Email2Matrix](https://github.com/devture/email2matrix) for relaying email messages to Matrix rooms
+
 - (optional) [Dimension](https://github.com/turt2live/matrix-dimension), an open source integrations manager for matrix clients
 
 Basically, this playbook aims to get you up-and-running with all the basic necessities around Matrix, without you having to do anything else.
@@ -108,6 +110,8 @@ This playbook sets up your server using the following Docker images:
 
 - [devture/exim-relay](https://hub.docker.com/r/devture/exim-relay/) - the [Exim](https://www.exim.org/) email server (optional)
 
+- [devture/email2matrix](https://hub.docker.com/r/devture/email2matrix/) - the [Email2Matrix](https://github.com/devture/email2matrix) email server, which can relay email messages to Matrix rooms (optional)
+
 - [devture/matrix-corporal](https://hub.docker.com/r/devture/matrix-corporal/) - [Matrix Corporal](https://github.com/devture/matrix-corporal): reconciliator and gateway for a managed Matrix server (optional)
 
 - [nginx](https://hub.docker.com/_/nginx/) - the [nginx](http://nginx.org/) web server (optional)