From 457afb90c1d18ef006b8089a76f69656fb8a6638 Mon Sep 17 00:00:00 2001
From: Will Power <github@willpoweredinc.co.uk>
Date: Tue, 25 Jul 2017 15:47:18 +0100
Subject: [PATCH] don't create empty parts in a multi part email (#267)

---
 app/models/outgoing_message_prototype.rb | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/app/models/outgoing_message_prototype.rb b/app/models/outgoing_message_prototype.rb
index 231bbf3..83e04cc 100644
--- a/app/models/outgoing_message_prototype.rb
+++ b/app/models/outgoing_message_prototype.rb
@@ -163,11 +163,15 @@ class OutgoingMessagePrototype
       if @html_body.blank? && attachments.empty?
         mail.body = @plain_body
       else
-        mail.text_part = Mail::Part.new
-        mail.text_part.body = @plain_body
-        mail.html_part = Mail::Part.new
-        mail.html_part.content_type = "text/html; charset=UTF-8"
-        mail.html_part.body = @html_body
+        if !@plain_body.blank?
+          mail.text_part = Mail::Part.new
+          mail.text_part.body = @plain_body
+        end
+        if !@html_body.blank?
+          mail.html_part = Mail::Part.new
+          mail.html_part.content_type = "text/html; charset=UTF-8"
+          mail.html_part.body = @html_body
+        end
       end
       attachments.each do |attachment|
         mail.attachments[attachment[:name]] = {