Hello,
EVENT, NOTIFY and AMNOTIFY support MAILBOX option. So that an Email can be sent out based on the condition. See "Chapter 8: Setting the Initialization Parameters" ->"MAILLIST Data Set" on "Installation and Configuration Guide", and EVENT, NOTIFY and AMNOTIFY on "Command Reference Guide" for more detail.
However you can only change the Email subject, and can't attach a doc or change the Email content in ESP. You may post an idea for possible future Enhancement.
Thank you,
Lucy