Change Incoming Email Notification Sound on Mac

How can I change the incoming email sounds on Mac OSX, as I would like it to match my iPhone.

If it’s similar to Windows, under EMClient install folder / directory on your computer, there is a sub folder called “Sounds” which on Windows has eg: “new_mail.wav” for incoming email sound. See if you have a folder like that and there should be an equivalent for Mac OS/X and might have a differant .ext like .aac , .aiff. I don’t know if Mac EMClient has a same .wav sound ext but if it does, it should be there. Once you find that, you can then rename the current one to .old and then replace it with your own sound file.