If whatever submits the next job is something like a rexx program which takes the next jobname as an argument so that you only have the one program catering for all your submits then you should be able to amend it to work along the lines of:
If job OK
Then submit nextjob
Else do email stuff
I am not sure how you would go about checking the job OK bit - but it probably means reading various manuals - possibly chasing a control block or two.
No JCL changes just one program to be changed - well, practically re-written.
But it depends on how you do this next job submission
The problem I have is that people can explain things quickly but I can only comprehend slowly.