Contact DB Management System

We are looking for a web-based software to house a growing contact list that is used mainly for email marketing that can do the following: • Holds a large amount of records • Unlimited storage • Easy to use • Sharable – access by multiple people within the company • Easy import and export of excel files • Handles .txt, excel and .csv files • Sorting and filtering features • Mechanism that can add bounce codes, unsubscribe codes, etc…(easily updated) There are probably more specifications that we'd like to have but we're hoping a freelancer can give their input from their experiences.