To determine if an e-mail has been processed by the Crossware Mail Signature application it is possible to check some fields that are added to the e-mail during the processing.

These fields are added regardless of weather a signature has been appended.

1. CWEsigProcessed?

This field is set to 'Y' when the application has processed the e-mail. This field is used to tell other servers that may process the email that is has already been processed.

2. MAIL_SIG_SERVER field

This field contains the server that processed the e-mail

3. MAIL_SIG_VERSION

This field contains the version of the software that processed it.