New messages that have been received appear in your Outlook mailbox as Unread emails, with a bold blue header and a blue indicator vertical bar on the left. After you open the message, Outlook automatically marks it as Read, changes the bold blue highlight to regular, and hides the blue unread indicator bar:

Outlook automatically creates Data Files as needed when you add accounts. In addition, Outlook automatically creates data files when you perform data archiving. Organizing data files allows you to access previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an Internet connection.

By default, Outlook automatically checks for new incoming and outgoing messages when it starts and at certain intervals defined in the Send and Receive groups. In addition, if your computer is connected to a network, e-mail is automatically sent by default when you click the Send button:

For slow Internet connection, it is often necessary to limit the size of downloaded messages and their attachments. For example, when working at the airport or in the road, you need to check important and urgent information.

Once in a while, you may not want to download an entire e-mail from your mail server, such as when you have a slow Internet connection or want to start looking through many email messages for a particular one as soon as possible. Outlook offers the capability to download only the email header, which includes the sender and the subject of the email, and display these onscreen before downloading the message itself:

Outlook provides a very useful feature for working with email addresses - AutoComplete, which allows you to quickly select and enter frequently used email addresses from the AutoComplete list, also known as the nickname cache.

By default, Microsoft Outlook uses one profile, which consists of email accounts, data files, and information about where the configured email data is stored. Profiles in Outlook are created when you customize Outlook.

You can create and use your own e-mail account from a lot of different services; many of them are free, such as www.outlook.com from Microsoft. Nearly every home and business Internet provider also offers an e-mail service. In Outlook, you can connect one or more email addresses from both Microsoft and other providers. To organize your email addresses in Outlook, you can create different profiles.

Currently, Outlook for Web messages text is created in the 12-point black Aptos font. You can use the default font and then apply different fonts, styles, and formatting options for characters, paragraphs, and more in Outlook for Web messages (just as you do in other Microsoft applications, such as Word or PowerPoint):

By default, text in Outlook messages is shown in 11-point Calibri, black for original messages and blue for responses, arranged in left-aligned paragraphs on a white background. In Outlook messages, you can apply two types of formatting at the same time: