The "mailto:*" opens a popup to choose a mail client. Thanks. Cause The following two conditions together create this issue: Condition 1: IE 8 Protected Mode is Off IE 8 has a security feature called Protected⦠We are both using V11, we both run Windows 7 and we both use Thunderbird. This works fine with IE8 windows 7. Click the âShow Advanced Settingsâ link at the bottom of the screen. I am afraid I was not able to reproduce the issue. As you can see, setting up a mailto is one of the easiest things in HTML. How to Create Mailto Links. Most websites support several possible wins. If you replace the spaces with %20, then you should be back in business. Then click the âContent Settingsâ button under the âPrivacyâ header. Iâm not sure how useful this is, but itâs an interesting curiosity that you can make a