If a reply is somehow being sent automatically for an IBM product and IBM Support cannot tell you why and you’re running V5R2 or later, then review the Reply Handling Exit Program exit point, QIBM_QMH_REPLY_INQ, with the WRKREGINF command. (This may apply to any inquiry message, but your question is about an IBM product.)
There might be a BRMS program enrolled there or some other program. And if there isn’t anything enrolled, you might consider enrolling a program of your own. You could override the reply or possibly just delay the reply until your exit program contacted an operator and received some direction.
But be careful of generating a new inquiry message out of your exit program! Use some other means of operator communication. This simply avoids potential recursion issues that you don’t need to deal with.