Add html email

README.md

@@ -20,13 +20,20 @@
 * setup a proper fake smtp server
   - a few names: Mailcatcher, Maildev, Mailhog
   - Mailhog: free software, easy to install (go, docker)
-  - docker run -d -p 1025:1025 -p 8025:8025 mailhog/mailhog
+    + wget https://github.com/mailhog/MailHog/releases/download/v1.0.1/MailHog_linux_amd64
+    + docker run -d -p 1025:1025 -p 8025:8025 mailhog/mailhog
 
 ## Other problems with sending mail
 
 * in dev/testing env, we don't really want to send to the actual recipients
   - but we still want to craft the email for them
-* 
+
+## Other benefits
+
+* can test email displays as wanted
+* can check attachments (receipt, invoice...)
+* API -> can be used in unit tests / CI
+* Test deliverability issues with Jim: MailHog's Chaos Monkey
 
 
 ## Links