SAS has become a follower not an innovator in the technical connections. It is possible you are needing the last version of SAS to get more of it.
SAS(R) 9.4 System Options: Reference, Third Edition (9.4) there is a emailackwait option SAS(R) 9.4 Language Reference: Concepts, Fourth Edition
I hope you are able to send a single message before trying to do the bulk ones.
---->-- ja karman --<-----