Dynamic alert configuration to include filename in alert category

Hi Experts,

We have a requirement in one of our scenarios (File to Idoc) to generate Alerts for errors in IE and send mail to excepted recipient with the error description. The mail body in this case should contain the sender filename for which the error occurred.

We are able to trigger mail with in case of error, but not able to include the sender filename or anysuch dynamic value in the mail body other than the standard alert variables provided by XI.

Can we define our own container variables that can be populated at runtime (eg. message mapping) with the required information and then use this variable in the alert rule and if so how.

Any help on this would be much appreciated.

Regards,

Shiladitya