Issue Summary

When you reply an email from a notification to add a comment into the issue with outlook for windows, the icons from the email body like the button icon and the Jira icon are added as attachments in the issue

Steps to Reproduce

1. Reply from a notification to add a comment in the issue
2. Use Outlook in Microsoft, I have tested on Outlook 2016
   Attachment BUG.mp4

Expected Results

Add the last text as a comment

Actual Results

The Jira icon and other icons from the email body are added as attachments

Workaround

We have identified this BUG using Outlook 2016 and outlook 2013 in windows, using outlook in MAC and other email applications the attachments are not added.