I don't understand the negative reviews listed here. I've used Mail.com for a month, and haven't had any issues mentioned at all. I'm not a business, just using it for my personal and genealogy use. I like the clean and organized interface, the presentation of the service, the ease of use, lots of features for a free account.
The things I don't like about it, s the service will log you out after a small period of time of inaction. It's a bit cumbersome to get to your email box. It also provides unnecessary messages, such as leaving the email site, informing you're waiting for more than 3 seconds, "click here" option. It seems to me they gear a lot of that for beginners. About 99% of people don't need that handholding.
With that, I would never use this service for a business or business related use, as it doesn't provide encryption the emails. So for someone who wants an nice email service for personal use for friends, clubs, and bloggers, this is a great option.