Add more details about new email features in 2.14

Change-Id: I5d68b8c2fd97f3be35acf0bcd9b7bb76044e9407
diff --git a/releases/2.14.md b/releases/2.14.md
index 814bda5..5c4ea64 100644
--- a/releases/2.14.md
+++ b/releases/2.14.md
@@ -6,6 +6,7 @@
 
 * Changes can be assigned to specific users
 * HTML emails and new templating framework
+* Support for receiving review comments by email
 * Secondary index with Elastic Search
 * New [Polymer](https://www.polymer-project.org/) based user interface
 * Support for elliptic curve/ed25519 SSH keys
@@ -49,12 +50,28 @@
 
 ### Emails
 
-Gerrit email messages are made easier to read by sending HTML content parts in
-addition to the existing text email content.
+#### HTML Emails
 
-Mail templates can now be written using Closure Templates (Soy). Mail templates
-written in Velocity (VTL) are deprecated but still supported. Support for VTL
-will be dropped in the next release.
+Gerrit email messages are made easier to read by sending HTML content parts in
+addition to the existing text email content. This is enabled by default, and
+can be disabled by setting
+[`sendemail.html`](http://gerrit-documentation.storage.googleapis.com/Documentation/2.14/config-gerrit.html#sendemail.html)
+to `false`.
+
+Users can opt to always receive plaintext emails by setting the
+[Email Format preference](http://gerrit-documentation.storage.googleapis.com/Documentation/2.14/intro-user.html#email-format).
+
+#### Closure Templates
+
+Mail templates can now be written using
+[https://developers.google.com/closure/templates/](Closure Templates) (Soy). Mail
+templates written in Velocity (VTL) are deprecated but still supported. Support
+for VTL will be dropped in the next release.
+
+#### Review Comments by Email
+
+Gerrit now supports
+[receiving review comments by email](http://gerrit-documentation.storage.googleapis.com/Documentation/2.14/intro-user.html#reply-by-email).
 
 ### Secondary Index with Elastic Search