Tested this issue on reported chrome version 67.0.3396.87 and latest stable 67.0.3396.99, latest chrome version 69.0.3481.0 and also M-60 using Windows 10. Attaching screen-cast for reference.

Steps: 
---------
1. Launched reported chrome version  
2. Logged into gmail account and Opened new tab and dropped given html file in new tab
3. Navigated both URL's ""mailto href set straight away"" and ""mailto href set after 2 seconds"".
As we are able to see the url and observed outlook popup.

@Reporter: Could you please review the attached screen-cast and confirm if anything being missed here and also Can you please upgrade to latest chrome stable 67.0.3396.99, you can download latest chrome builds here:""https://www.chromium.org/getting-involved/dev-channel"". Let us know whether issue still persists.

Thanks.!

Deleted: 859002.mp4 262 bytes

	859002.mp4 262 bytes View Download

@phanindra the screencast you have provided doesn't appear to work, and is only 262 bytes?


> "As we are able to see the url and observed outlook popup."
- You should not see an Outlook popup, you should see a new Gmail compose tab opened in the browser.

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Issue 865081 has been merged into this issue.

> 2. Associate mailto handlers with web based email client, such as Gmail

How did you do this?

@tkent

Follow these steps: https://developers.google.com/web/updates/2012/02/Getting-Gmail-to-handle-all-mailto-links-with-registerProtocolHandler

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Thanks.  I did the navigator.registerProtocolHandler() stuff, and couldn't reproduce this issue. The second link in https://jsfiddle.net/459rnd0m/10/ opened Gmail compose view with "What a 'wonderful' email" and "https://www.test.com".

Did you see any difference of URLs opened by 2 links in https://jsfiddle.net/459rnd0m/10/ ?

Thanks @tkent

On several Windows machines I've tried, the first one opens as expected, but the second link just opens a blank tab in the browser and no compose view is shown. These tests all work absolutely fine on a Mac.

Rather odd!

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Reporter,

Did you see any difference of URLs opened by 2 links in https://jsfiddle.net/459rnd0m/10/ ?

Have your Chrome installed any Chrome extensions?

"Issue 865081 has been merged into this issue." - can you please unmerge that issue from this ticket as issue seems to be completely (as stated in recent comments) and also reproducible not only on Win as here but on Mac as well. 

We have tried this on a Chrome incognito window, with no extensions, and the same behaviour is shown.

For the first link, the URL is: https://mail.google.com/mail/u/0/?view=cm&fs=1&tf=1&source=mailto&su=What+a+%E2%80%98wonderful%E2%80%99+email&body=https://www.test.com

For the second link, the URL is: mailto:?subject=What%20a%20%E2%80%98wonderful%E2%80%99%20email&body=https%3A%2F%2Fwww.test.com

This was tested on an incognito window.

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Ok, it seems the mailto: URL produced with the second <a href=""> is correct.  So this would be a custom protocol handler issue or a browser navigation issue.

I still can't reproduce this on Windows 10.  I'm not sure if we can investigate this issue furthermore.

Ok that's helpful. I will try to look deeper into the protocol handler. Thanks very much for looking into it.

As per comment #18 adding Needs-Feedback label to it and waiting for the response from reporter. 

Thanks..!

Closing no activity issues.
Please feel free to re-open if there is update.