if you want a free responder, i've had luck with sendfree (it's what i use on my site in my signature)
very helpful discussion - I am in the market, and have checked out the big 2 - Me thinks I will go to Getresponse!!
For business use, there are really only 2 options.Getresponse or AWeber.All the big-time marketing gurus trust their email lists with one of these companies.
I agree with Tom. I have been using AWeber for many years now, and it's awesome (but I guess people using Getresponse will say the same for Getresponse). Jens
I highly recommend GetResponce. For many years I used to use Constant Contact auto responder but recently changed to GetResponce; really simple and easy to use.