Use credentials instead of files to define the template

app/mailers/system_mailer.rb

@@ -13,8 +13,8 @@ def send_message(options)
 
     if options[:content_type].present?
       mail(mail_options) do |format|
-        format.text { render template } if options[:content_type] == "text/plain"
-        format.html { render template } if options[:content_type] == "text/html"
+        format.text { render inline: template } if options[:content_type] == "text/plain"
+        format.html { render inline: template } if options[:content_type] == "text/html"
       end
     else
       mail(mail_options)

app/models/agents/email_agent.rb

@@ -28,8 +28,8 @@ class EmailAgent < Agent
       You can provide a `content_type` for the email and specify `text/plain` or `text/html` to be sent.
       If you do not specify `content_type`, then the recipient email server will determine the correct rendering.
 
-      For more complex message formatting, if you specify a `content_type` then you can also provide an alternate message `template` name.  A user-defined
-      `template` matching the name which must be located in `'../huginn/app/views/system_mailer'` as `<template_name>.html.erb` or `<template_name>.text.erb`.
+      For more complex message formatting, if you specify a `content_type` then you can also provide an alternate message `template`.  
+      It is best to use the liquid `credential` tag like so `{% credential message_template %}` to define the template format.
 
       Set `expected_receive_period_in_days` to the maximum amount of time that you'd expect to pass between Events being received by this Agent.
     MD