Zabbix 1.8.2 (FreeBSD port)

need an expandable scheme with posibility to add and use original HTML tags (if needed), like:

<b></b>
<u></u>
<i></i>
<hr>
<mail></mail>
<font color></font>
<br>

Additional information:

NO <br> tags are required for text formatting.

Need only put <pre> tag BEFORE of message and </pre> AFTER.

This completely saves all linebreaks.

Having HTML Email capability would be great. I have wanted to enable automatic emails to be sent to our clients, but we required it to be formated properly.

for example, in action should be parameter something: "INSERT HTML CODE" or "HTML CODE". After, we can create html message in LibreOffice, insert zabbix macros keys and paste this html source to action.
Most customers whants it own corporate standard message form. So technical support or zabbix owner can receive plain text messages, and business users can receive html formatted

It could also help to workaround a specific Outlook behavior (removing line breaks in plain text mail by default).
https://support.microsoft.com/en-us/kb/287816

As a workaround:
I've been using a small change in a source code before compiling zabbix since 1.6 without any issues:

I've been constantly changing one single line in src/libs/zbxmedia/email.c

	tmp = zbx_dsprintf(tmp,
			"From: %s%s\r\n"
			"To: %s%s\r\n"
			"Date: %s\r\n"
			"Subject: %s\r\n"
			"MIME-Version: 1.0\r\n"
			"Content-Type: text/plain; charset=\"UTF-8\"\r\n"
			"Content-Transfer-Encoding: base64\r\n"
			"\r\n"
			"%s",
			NULL != from_display_name ? from_display_name : "", from_angle_addr,
			NULL != to_display_name ? to_display_name: "", to_angle_addr,
			str_time, localsubject, localbody);

to

	tmp = zbx_dsprintf(tmp,
			"From: %s%s\r\n"
			"To: %s%s\r\n"
			"Date: %s\r\n"
			"Subject: %s\r\n"
			"MIME-Version: 1.0\r\n"
			"Content-Type: text/html; charset=\"UTF-8\"\r\n"
			"Content-Transfer-Encoding: base64\r\n"
			"\r\n"
			"%s",
			NULL != from_display_name ? from_display_name : "", from_angle_addr,
			NULL != to_display_name ? to_display_name: "", to_angle_addr,
			str_time, localsubject, localbody);

This actually allowed me to color-code problems with RED against GREEN for recoveries
And to use clickable links to Zabbix and Ticketing system:

And that didn't break my plain text alerts (for SMS for instance) if I wanted to use them at the same time.

And IMHO, text/html could be a default for Zabbix without any serious consequences.

Before this issue is solved - here we can find some workarounds for this problem via external scripts:
https://blog.keios.eu/note/html-e-mails-zabbix
http://va0816.blogspot.ru/2013/07/zabbix-htmlmail.html
http://wordpress.jpcorp.eti.br/?p=545

Available in 4.2.0alpha1 (trunk) r87279.