MsgFiler Plugins Updated for macOS Monterey 12.1

If you have upgraded to macOS Monterey 12.1, your MsgFiler mail plugins may have been disabled. If so, please upgrade to the latest versions of the plugins:

  • MsgFiler Engine: Version 1.6.1 works with macOS 12.1. This is the plugin you should install if you are purchased MsgFiler from the Mac App Store.
  • MsgFiler Classic: Version 2.6.1 works with macOS 12.1.

If you are running a previous version of macOS, such as Big Sur, Catalina or Mojave, you should not need to do anything.



  1. Hello Adam

    I have Message Filer Version 3.1.4. I’m still on Catalina but expect to upgrade to Monterey. Will that work, or do I need to download another version of Message Filer?

    I love the app. I’m an information pack rat, so it keeps my emails organized.



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  2. MsgFiler is my favorite app of all time but now it won’t work for me, despite my having spent HOURS downloading the new Msg filer and engine. is there someone I can pay to be on the phone with me and walk me through makig it work again? PLEASE?

  3. I will be getting a new M1 Mac in about a month and consider MsgFiler essential to use MacMail effectively. Can you tell me if your Monterey compatible version works with M1 chip as well–either through Rosetta or natively? Thanks.

    1. Yes, MsgFiler works through Rosetta on M1 Macs. Make sure you have the latest version of the Engine installed properly. Apple has stated that they are deprecating Mail plugins, but has given no timeline for when this will happen. When it does, however, MsgFiler as its designed today will cease to work. While I would like to port MsgFiler to use MailKit (the new framework), MailKit does not offer the same level of support that the existing plugin architecture allows. So, it remains to be seen if MsgFiler will work in a post-plugin world.

      1. Thank you very much for your reply, Adam. I will see what my options are for a possible alternative to Mac Mail if/when that occurs. I have only found Apple mail an acceptable business-level mail program by using it in tandem with your software.

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