macOS 15: mailto does not open a new mail compose window in eM Client desktop app

Hello everyone, I am working with macOS 15.4 and have set eM Client as my default e-mail application.

When I click on a “mailto” link on a web page, eM Client opens, but no mail compose window opens.

I have 3 Pro licenses and the behavior shows up on all 3 Mac computers. Two of the Mac computers are running macOS 15, one old one is still running macOS 12.

It also makes no difference which browser I use. I have tested it with Safari, Brave, Firefox and Edge and in all cases eM Client opens, but no mail compose window opens.

With Apple Mail, “mailto” links work as expected: a mail compose window opens and the email address is entered.

My macOS is up-to-date, I am using the latest version of eMClient and I have given eM Client all the requested permissions in the system settings.

Now I have no further ideas on what I can do to change the behavior in eM Client so that a mail creation window is also opened for “mailto” links.

Do any of you have any good advice for me?
Many thanks in advance for any help.

I can only tell you that here (Monterey/Firefox) the mailto: works perfectly well, and I use it several times a day to “forward” online articles this way.

@Kaffeepause Do you use version 10.3 and do you use profiles?

Thank you very much for your answers.

@tingo : That could indicate that it is related to the operating system version. I will test it again on my older machine that still has Monterey.

@Michal_Burger : I am using version 10.3.1503 (eb0592f) for Mac. I do not use profiles.

What do you suggest? Would it make sense to set up a profile?

We were able to reproduce the problem with use of profiles on 10.3 and we are working on a quick fix. Hopefully (and I guess so) it is the same issue. I hope the fix would be available later tonight.

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@Michal_Burger Thank you very much for your quick response.

I look forward to the fix. I will then report whether my problem has been resolved with the fix.

The fix is ready:

Windows
https://www.emclient.com/dist/v10.3.1567/setup.msi

Mac
https://www.emclient.com/dist/v10.3.1567_Mac/setup.pkg

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Thank you very much for your quick help!

I had time to test the update yesterday. Now “mailto” works for me.

Thank you very much for your support and I wish you happy Easter holidays.

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