I'm working on a new marketing strategy where I will input email addresses of the people that say "I don't need a web page now" or "I don't need a new/mobile web page for now". I want to send them weakly emails with free online tools, example "Yesaware". I figure this way I will get their business when they do decide to do something with their webpage.
So is there any free tools that would allow me to manually input their email address and also that's easy to navigate? Like, say I wanted to view the people that have been receiving my emails for 3 months now, just so I can give them a call or something.