By design, the Zoho autoresponders require an actual series of dates.  This effectively makes the tool useless to me.  You need to change the date requirement so that it can allow for dynamic ranges.  The dates should not be firm, but instead based on a date of today plus N days.  For example:

Email 1 = Today (so the date the autoresponder is applied to the record, email 1 is sent)

Email 2 = +14 days (so the autoresponder waits 14 days from the first email being sent, then sends email 2)

Email 3 = +30  (autoresponder waits 30 days from email 1, then sends email 3)

Email N = +N (autoresponder waits N days from email 1, then sends email N)...

This would make the tool infinitely more useful.  We have many customers that register on our site without providing a phone# and it's a waste of time for our reps to manually email these customers.  Ideally, we'd pass a value to the contact record to determine which autoresponder to use and Zoho would take it from there... aka, the autoresponder would have to communicate with a work flow process or something of a similar nature so that it can recognize the autoresponder value on a contact record and trigger it to be processed... There's a lot of potential here.  [Tip: Again, I hate GoldMine, but they got this right.  Look into the GoldMine Autoprocess if you want a blueprint for how to build this.]

-J