Mailto links in Firefox

Hi John,

the person on the Softmaker website is just showing the settings he made in 3 screen shots.

Although I would also connect ‘e-mail senden’ under ‘MAPI’ to eM Client.

Thank you for this clarification.


Nope, still broken with me…

eM Client 6.0.19861.0


I will express myself tomorrow.


I`m use eMClient here in Germany as a bundle with SoftMaker Office 2012, a great alternative to Microsoft Office. My problem is the same as you. A few months ago I switched from Chrome (without our problem) to Firefox ( with our problem). A few days ago I had clean installed my laptop with Windows 7/64, the driver and eMClient. I thought that version 6 brings help. But it is not so. I’ve tried some things, without realy help. I can not say which step brought the help .Please turn in Picture 3 on “Non-Microsoft” and / or " Microsoft Windows". Then reboot Windows and sit again “Custom” with the hook set. I hope it helps some. Sorry, my English is not realy good, but I hope, anyone can use this.

Hi Waldy,

I tried your suggestion and it did solve my problem:

  1. Set “Microsoft Windows” from Control Panel > Default Programs > Set Program Access and computer defaults
  2. Reboot
  3. Set Custom from the Set Program Access and computer defaults.


I`m glad that I could help. Perhaps the programmers can fix the problem now.

Hi, unfortunately from our side it is not technically possible to do more than we are doing at this moment.


I solved by adding this to the windows registry: (Windows 7 64bit)

@=“eM Client URL”
“URL Protocol”=""

@=“C:\Program Files (x86)\eM Client\MailClient.exe”



@="“C:\Program Files (x86)\eM Client\MailClient.exe” /mailurl “%1"”

For those still having the same issue (I was until a few moments ago): Albert’s solution above does work. If you use regedit to add the values then remove the outer quotes, replace all " with just " and all \ with just a single . For example, under HKEY_CLASSES_ROOT\mailto\shell\open\command create a string value with name @ and value

“C:\Program Files (x86)\eM Client\MailClient.exe” /mailurl “%1”

Then, make sure eM Client is set as the default mail program, restart Firefox, and then in Firefox go to Tools->Options->Applications, find “mailto” and select “Use eM Client (default)”.