About autoresponder message order

[XJ2]

I have a question:

Let's say I set 3 follow up messages in an autoresponder.

Day 0 - message #1
Day 1 - message #2
Day 2 - message #3

Then, on day 8, I decide to add another message to that sequence:
Day 3 - message #4

Obviously a news subscriber will smoothly receive the whole sequence, but what about the elder one? Would they have a chance to receive the message #4, considering that on their day 3 there were no messages scheduled to be sent?

What is the common habit among the autoresponders?

[crissanteiro]

I use Aweber. And in Aweber, they would receive your 4th message right away, since it is already due on the sequence of messages.

I have added messages like that, later on, and they have received it, even if it's been later than day 3.

[XJ2]

It makes sense, so I'll assume this is the standard behavior of any AR. Thank you.