AVC mail: email id derivation

Hi,

We are implementing BCS in an existing SAP system. The requirement is to throw a warning message and send the budget supervisor a mail whenever the PR amount budget exceeds the budget. I have maintained in the tolerance profile with the following settings:

a. whenever the budget gets exceeded, system will throw a warning message.

b. Availability control event: IMLE with internal mail (repeated).

Now whenever the budget gets exceeded, in SOST transaction I can see a mail has been generated with a particular mail id. However I could not find from where the mail id is derived. I haven't activated any BADI for mail recipient.

I need to know how can we get into the table where these mail ids are maintained. Request your inputs on the same.

Thanks in advance!

Snigdho