give option to set relative days between messages
I'd like to see the ability to set a days delay between messages. I.e. instead of a messaging being sent on day 30, it would be sent 3 days after the previous message. We could then insert messages without having to go through the whole list renumbering them. it would still be nice to have the listing tally the days, though, so we can see easily what day the message will send (i.e. we'd see that message 5 will go out 4 days after the previous message and day 30 total in the series.) It is my understanding that some of the other big emailing services do this.