adding mx and cname

docs/_functions/domain/CNAME.md

@@ -2,14 +2,14 @@
 name: CNAME
 parameters:
   - name
-  - address
+  - target
   - modifiers...
 ---
 
 CNAME adds a CNAME record to the domain. The name should be the relative label for the domain.
 Using `@` or `*` for CNAME records is not recommended, as different providers support them differently.
 
-Adress should be a string representing the CNAME target. If it is a single label we will assume it is a relative name on the current domain. If it contains *any* dots, it should be a fully qualified domain name, ending with a `.`.
+Target should be a string representing the CNAME target. If it is a single label we will assume it is a relative name on the current domain. If it contains *any* dots, it should be a fully qualified domain name, ending with a `.`.
 
 {% include startExample.html %}
 {% highlight js %}

docs/_functions/domain/MX.md

@@ -0,0 +1,25 @@
+---
+name: MX
+parameters:
+  - name
+  - priority
+  - target
+  - modifiers...
+---
+
+MX adds an MX record to the domain.
+
+Priority should be a number.
+
+Target should be a string representing the MX target. If it is a single label we will assume it is a relative name on the current domain. If it contains *any* dots, it should be a fully qualified domain name, ending with a `.`.
+
+{% include startExample.html %}
+{% highlight js %}
+
+D("example.com", REGISTRAR, DnsProvider(R53),
+  MX("@", 5, "mail"), // mx example.com -> mail.example.com
+  MX("sub", 10, "mail.foo.com.")
+);
+
+{%endhighlight%}
+{% include endExample.html %}