# Problem From #1332 Right now, a ReplyToEmail is send once for each participant in the conversation. Instead, we should create a transmission for all the participants. We can make use of SparkPost user based substitution data.
Problem
From #1332
Right now, a ReplyToEmail is send once for each participant in the conversation. Instead, we should create a transmission for all the participants.
We can make use of SparkPost user based substitution data.