# KeepMetadataRegex

A regular expression that matches document fields that you want to add as EML headers without an "X-" prefix. All other document metadata fields are added as EML headers with an "X-" prefix. Therefore, the regular expression should usually match field names that correspond to standard EML headers such as "To", "From", or "Subject".

When `StoreBinaryAndMeta=TRUE`, this parameter has no effect.

Type: | String (regular expression)
Default: | `.*`
Required: | No
Configuration Section: | Ingestion
Example: | `KeepMetadataRegex=To|From|Subject`
See Also: | StoreBinaryAndMeta

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