free autoresponder with no ads?

Hello forum members,

Do you know a good autoresponder which is free or has at least 2 months free trial, doesn't inforce ads while it's being used free and supports more than 12 follow ups while used free?

Also a good feature would be that it comes with many
autoresponders so it's possible to promote different affiliate programs through it.

I am in search for such an autoresponder. I know that
freeautobot.com is close to that conspect but it is unreliable (That's only my personal opinion), because it doesn't reply to an email instantly.

Do you know such autoresponder?

Regards,
Ron