MAILTO: Opens eM Client Inbox but not new message


This has just started. MAILTO: links only open the eM Client Inbox but they won’t open the New message window.

I’ve checked default Apps, made sure no odd recent Windows updates, tried re-installing … but the problem is still there.

I have to admit I’m using Windows 8.1, but the issue wasn’t present yesterday.

Does anyone have any suggestions, please?


miércoles 07 febrero 2024 :: 1945hrs (UTC +0100)

I can not comment on the issue with Windows 8.1; I have just checked with Windows 10 & 11 Pro with eMC v9.2.2157 and there is no issue and the new mail window opens.
What version of eMC do you have?
Have you changed anything in your OS?

¡Buena suerte!


¡Los mejores desde Valencia y mantente a salvo!

[email protected]

Hablo español, luego portugués, inglés, francés y alemán
con conocimiento de varios otros idiomas.

Hello Skybat!

Thank you for getting back to me.

I too am using version 9.2.2157 (5b49542).

I have not made any changes to the OS that would affect this, and it has been working 100% until earlier on today.

I am sure I must have used MAILTO: since the 2157.0 update, but maybe coding changes have meant it is no longer compatible with Windows 8.1?

If eM Client is closed and I click a MAILTO: link, it opens the application to the Inbox.

If eM Client is already open and I click a MAILTO: link, it just brings the Inbox into focus.

I backed up the database and my personal theme and then fully uninstalled eM Client but a fresh installation makes no difference.

Take care!


Are you sure the compose window isn’t open, but off-screen. So there is a taskbar icon for the window, or you see it in Alt-Tab.

Hi Gary,

Good point; but, No unfortunately. :grimacing: