king-phisher: Message body not showing at recipient

Issue Description

HTML message body was showing properly in Preview mode, successfully delivered to recipient but just with 1 line “This message requires an HTML aware email agent to be properly viewed.” if he/she opens it on a browser (Chrome).

Reproduction Steps

1. Compose email body as below HTML in Error Detail section
2. Preview and send
3. On recipient side, open Gmail on browser, open the email.
4. See only “This message requires an HTML aware email agent to be properly viewed.”

Environment Details

Host OS: Ubuntu 14.04 LTS King Phisher Version: 1.10.0 (rev: 63aaf4772ed9)

Error Details / Stack Trace

Hello {{ client.first_name }},<br> <br> From the monitoring system, we found your account's password has been compromised.<br> Please hurry to change your password by using <a href="{{url.webserver}}">this link.</a><br><br> Please don't hesitate to contact IT Team if you have any question.<br><br> Thanks,<br> <br> IT Team<br>