GMX is a free email service with unlimited storage. Less well known than other email services like Gmail, GMX offers a number of additional features which make it a solid choice. Social media integration automatically adds contacts information, storage is never a problem and emails are secured privately. The main drawback is the high level of advertising which can quickly become frustrating and distracting. Beyond this issue, GMX offers a solid basic service good for those with a need for large storage or unhappy with the email account market leaders.