fix comment

lib/multi_mail/postmark/receiver.rb

@@ -10,12 +10,14 @@ def transform(params)
           headers[header['Name']] = header['Value']
         end
 
-        # Due to scoping issues, we can't call `address` within `Mail.new`.
+        # Due to scoping issues, we can't call `transform_address` within `Mail.new`.
         from = transform_address(params['FromFull'])
         to   = params['ToFull'].map{|hash| transform_address(hash)}
         cc   = params['CcFull'].map{|hash| transform_address(hash)}
 
         message = Mail.new do
+          headers headers
+
           from      from
           to        to
           cc        cc
@@ -32,8 +34,6 @@ def transform(params)
             body CGI.unescapeHTML(params['HtmlBody'])
           end
 
-          headers headers
-
           params['Attachments'].each do |attachment|
             add_file(:filename => attachment['Name'], :content => Base64.decode64(attachment['Content']))
           end