MsgFiler Engine
The support page for the MsgFiler Engine Mail Plug-In for MsgFiler 3.
The MsgFiler Engine is an Apple Mail Plugin that is a required add-on for MsgFiler 3 running on macOS from Mountain Lion to Ventura. It speeds up mailbox loading and filing performance to remote IMAP mailboxes.
The MsgFiler Engine plug-in no longer works on macOS Sonoma and higher. Please upgrade to MsgFiler 4 from the Mac App Store and be sure to install the MsgFiler Engine Filing script during the installation process of MsgFiler 4.
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