> For the complete documentation index, see [llms.txt](https://docs.editran.onesait.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.editran.onesait.com/documentacion-editran/connect-v2.1-en/firma/administracionconnectfirma/canal/configuracion_canal_recepcion_con_firma.md).

# Receiving channel

If a *channel* is for reception and has the signature characteristic marked:

* The files received through it are signatures that are verified immediately and automatically right after reception.
* The signature files that are received must have the extension `.xsig` or `.p7b` so that Connect recognizes them as such and can apply the desired verification processing to them.
* The verification of each signature file is carried out on two levels: a first one with respect to itself (structure, validity of the received certificates, integrity of the signed file, etc.) and another with respect to the signing rules, or *file groups*, that apply to it. Whenever possible, during the validation of the first level the signed file is extracted.
* The rules with which the signatures are verified are defined through the *file groups* purpose verification that are associated with the *channel*.
* Files are not configured from the menu **Contacts** and **Channels** menu but from the **File group**.
* In **Integration with applications -> Post-reception process** should not be activated **Move to directory** nor **Execute program** when this implies moving the received files with extension `.xsig` or `.p7b`. This is because the verification process can only be triggered if the signature files are in the reception directory.

The *file groups* purpose to verify, and that have already been configured for the *channel* of reception, are displayed listed in **Address book -> Contact -> Channel (Edit) → Files**.

![Listing of the file groups of a reception channel with signature](https://64653979-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvdpBggYaSLH9X3nOAiMG%2Fuploads%2Fgit-blob-8abf676ab85553d600219a02211951586bc3726f%2F03_listado_grupos_ficheros_canal_recepcion.png?alt=media)


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