s/email/text/ in To & From fields

type="email" does not validate RFC 2822 address lists

themes/alps/compose.html

@@ -14,7 +14,7 @@
 
         <div class="headers no-js">
           <label>From</label>
-          <input type="email" name="from" id="from" value="{{.Message.From}}" />
+          <input type="text" name="from" id="from" value="{{.Message.From}}" />
 
           <label>To</label>
           {{ $to := .Message.ToString }}