Emailer connection file
File type: Settings, options, themes or skins file
The .mccl file extension is used by Emailer for connection files.
An .mccl file stores Internet connection settings used by the Emailer email client.
File type category:
Settings, options, themes or skins file
Date updated: October 2, 2026
The .mccl file extension is associated with Emailer, an email client for classic Mac OS. The file contains the Internet connection settings used by the application.
Emailer and its .mccl connection files are obsolete. The product no longer receives support from its developer.
An .mccl file is intended to be used by Emailer rather than opened as a standalone document. Open it with Emailer on a compatible classic Mac OS system.
Modern email applications generally cannot open this format directly.
To use the connection settings in a modern email client, enter them again manually.
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