Signed agreement confirmation email from bulk send

I am using bulk send but do not recieve emails to confirm when recipients have signed their agreement. When i use the single send option everything works fine so its not being blocked by a filter.  I have been into the settings and made sure that notifcationas are on but there doesnt seem to be a seperate setting for bulk sends. A bit of research suggested there is a background setting that adobe can adjust  to change the Send in Bulk Notification Roll-up" property to "Unlimited.