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# Sending E-mail with a Signature

Use the following procedure to apply a signature to an e-mail that has scan file attachments.

1. Press [Security].

2. Select [Signature].

3. Press [OK].

- The certificate (device certificate) installed on this machine is used to attach signatures.

- Note that the following can result if certain signature settings are specified by the administrator:

  - [Signature] does not appear. This is because you cannot apply signatures to scan files that are sent by e-mail.

  - You cannot change the [Signature] settings. This is because a signature is always applied to scan files that are sent by e-mail.