# Recoll user manual
Configuration overview

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### The mimemap file

`mimemap` specifies the file name extension to MIME type mappings.

For file names without an extension, or with an unknown one, the system's file `-i` command will be executed to determine the MIME type (this can be switched off inside the main configuration file).

The mappings can be specified on a per-subtree basis, which may be useful in some cases. Example: gaim logs have a `.txt` extension but should be handled specially, which is possible because they are usually all located in one place.

The `recoll_noindex` `mimemap` variable has been moved to `recoll.conf` and renamed to `noContentSuffixes`, while keeping the same function, as of Recoll version 1.21. For older Recoll versions, see the documentation for `noContentSuffixes` but use `recoll_noindex` in `mimemap`.

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