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CF MC
Not possible

Convert CF to MC

Can you convert CF to MC?
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Is it possible to convert CF to MC?
No - not a direct conversion.

You cannot reliably convert a generated sendmail.cf back into its source sendmail.mc - the m4 generation is one-way (the friendly macros are expanded into thousands of rules). If you need the .mc, find the original or write a new one and regenerate the .cf from it.

No direct path

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Converting CF to MC

A .CF file and a .MC file hold different kinds of data, so there is no direct way to turn one into the other.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.CF Sendmail Configuration File

A CF file is typically /etc/mail/sendmail.cf, the plain-text configuration the Sendmail mail server reads at startup on Unix and Linux. Open it in any text editor to inspect it, but do not…

Open .CF details →
.MC Microsoft Windows Localized Message Table Resource

A .MC file is associated with Microsoft Windows Localized Message Table Resource, a developer file.

Open .MC details →