The first is through any computer with an Internet connection and a web browser and the second is through POP3 access. There are two ways to access a Hotmail email. Each attachment included in an email message cannot exceed 10 MB. Hotmail offers its users 1 gigabyte of storage for their emails and attachments. Hotmail, which the Microsoft Corporation owns and operates, is a free web based email program that is extremely similar to other types of free web based email providers.