To make Outlook work most efficiently, we recommend keeping your mailbox size as small as possible. Large mailboxes slow down browsing and receiving messages, can cause slow performance, crashes, and are more prone to corruption.

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:

By default, Outlook in Online mode sends messages immediately after clicking the Send button. You can configure your Outlook not to send messages immediately, send them manually, or set up rules to delay sending all messages for some fixed time (for example, 2 hours).

Having received a huge number of different promotions, discounts, last-minute offers, and limited time offers, we often check them when their validity period has already expired. To avoid missing such an offer or promotion, you can set reminders in Outlook. But it is also very useful to clean up, remove, or mark invalidated messages that are already overdue:

In Outlook, you can assign importance levels to outgoing messages so that recipients can quickly understand whether the message needs to be processed as soon as possible or can be left later. Some email clients, providers, or organizations may be configured to send low-importance emails only during non-business hours.

Voting Buttons in Outlook are a useful feature that helps you easily collect your colleagues' or friends' opinions, preferences, or decisions through email messages. Using Voting Buttons in email messages, you can create a poll, survey or just ask questions with a limited set of answers.

On replies to emails, the response (replying message) is returned, by default, to the sender of the email. In some business processes or projects, creating messages with responses collected by someone other than the message creator is often necessary.

You can easily choose which email account to use to send a new message in Outlook for Web when you work with more than one connected email account (e.g., a connected Google account).

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):

E-mail messages, like regular paper mail, should include a Signature to provide personal information about the sender. Of course, you can sign each new message manually or sign each time you reply or forward a message. To save time, eliminate repetition, and reduce mistakes, it is easier to create an electronic Signature that can be easily inserted into certain letters - automatically or manually.