What adding an inbox means and when you need it

Adding an inbox in Outlook means connecting a second email account to the same Outlook window so you can read and send from both addresses without switching between programs. This is different from creating a folder — you are actually linking another email account to Outlook, whether that account is through Microsoft, Gmail, Yahoo, or another provider.

You might need this if you manage work and personal email, run a small business with a separate email address, or inherited an account you need to monitor. Outlook can handle multiple inboxes at once, and each one appears as a separate folder in your left sidebar.

Key Takeaways

  • You add a new inbox by going to File > Add Account and entering the email address and password for the account you want to connect.
  • Outlook works with Gmail, Yahoo, and most business email systems, but you may need to generate a special password for Gmail or Yahoo instead of using your regular login password.
  • Each inbox appears separately in your folder list on the left side of Outlook, and you can read or send from either one without leaving the program.
  • If Outlook cannot connect automatically, you may need to enter server settings manually, which your email provider can give you.

Adding an inbox step by step

Step 1: Open Outlook and go to File. Click the File tab in the top left corner of your Outlook window. This opens a menu with account and settings options.

Step 2: Select Add Account. Look for the option that says "Add Account" and click it. Outlook will open a window asking for the email address you want to add.

Step 3: Enter your email address. Type the full email address for the account you want to connect — for example, yourname@gmail.com or yourname@yahoo.com. Then click Next or Continue.

Step 4: Enter your password. Type the password for that email account. If you use Gmail or Yahoo, see the section below about special passwords before you enter anything here.

Step 5: Wait for Outlook to connect. Outlook will try to connect to your email provider automatically. This usually takes a few seconds. If it succeeds, you will see a confirmation message and your new inbox will appear in the folder list on the left.

If Outlook cannot connect automatically, it will ask you to enter server settings manually. This is covered in the section below.

Gmail and Yahoo passwords: what you need to know

Gmail and Yahoo do not let Outlook use your regular account password for security reasons. Instead, you need to create a special password just for Outlook.

For Gmail: Go to myaccount.google.com, click Security on the left, scroll down to "App passwords," and select Mail and Windows (or your device). Google will generate a 16-character password. Copy this password and paste it into Outlook when prompted — do not type your regular Gmail password.

For Yahoo: Go to account.yahoo.com, click Security on the left, and look for "Generate app password." Select Mail and Windows (or your device), and Yahoo will create a password for you. Use this password in Outlook, not your regular Yahoo password.

If you do not see these options in your Gmail or Yahoo account settings, your account may not have two-step verification turned on. You can still add the account to Outlook, but Gmail and Yahoo recommend setting up two-step verification first for better security.

When Outlook cannot connect automatically

Sometimes Outlook cannot find your email provider's server settings on its own. When this happens, Outlook will ask you to enter the settings manually. Your email provider has this information — you can usually find it on their website under "IMAP settings" or "POP settings."

You will need to enter the incoming mail server (usually something like imap.gmail.com or mail.yahoo.com), the outgoing mail server (usually smtp.gmail.com or smtp.yahoo.com), and the port numbers for each. These numbers are typically 993 for incoming and 587 for outgoing, but your provider may use different ones.

If you do not want to hunt for these settings, contact your email provider's support team and ask them for the IMAP or POP server settings for Outlook. They can give you the exact numbers to enter. Once you enter them correctly, Outlook will connect and your inbox will appear in the folder list.

Finding and using your new inbox

After you add an inbox, it appears in the folder list on the left side of Outlook. Each inbox shows the account name or email address so you know which one you are looking at. Click on any inbox to open it and read your messages.

When you want to send an email, Outlook will ask which account you want to send from. Make sure you select the right one — if you send from your personal account when you meant to send from your work account, the recipient will see your personal email address.

You can also set a default account if you have a preference. Go to File > Options > Mail, scroll down to "Compose messages," and select which account you want Outlook to use by default when you create a new email.

Removing an inbox you no longer need

If you add an inbox by mistake or no longer need it, you can remove it without deleting the actual email account. Right-click on the inbox name in your folder list and select "Remove Account" or "Delete Account." Outlook will ask you to confirm. The email account itself stays active — you are just disconnecting it from Outlook.

If you want to add it back later, you can follow the same steps to add it again. Outlook will remember your settings if you added it before.

Troubleshooting common problems

Outlook says the password is wrong even though you know it is correct. If you use Gmail or Yahoo, you may have entered your regular password instead of the special app password. Delete the account from Outlook and add it again, this time using the app password from Gmail or Yahoo settings.

Outlook connects but you do not see any emails. Wait a few minutes — Outlook sometimes takes time to download your messages from the server, especially if you have a lot of email. If nothing appears after 10 minutes, try closing Outlook completely and opening it again.

You see an error message about server settings. The server address or port number may be wrong. Check your email provider's website for the correct IMAP or POP settings, or contact their support team. Then go back to Outlook, right-click the inbox, select Account Settings, and update the server information.

Frequently Asked Questions

Can I add more than two inboxes to Outlook?

Yes, Outlook can handle many inboxes at once. You can add as many email accounts as you need by repeating the Add Account steps for each one. Each inbox will appear separately in your folder list.

Will adding an inbox delete my emails from the original account?

No. Adding an inbox to Outlook only connects the account to the program — it does not change anything on the email server or delete any messages. Your emails stay where they are.

Do I need to be connected to the internet to use multiple inboxes?

Yes, Outlook needs an internet connection to download new messages and send emails from any of your inboxes. If you go offline, you can still read messages you downloaded before, but you cannot send or receive new ones until you reconnect.

What is the difference between POP and IMAP when adding an account?

POP downloads your emails to Outlook and removes them from the server, so you only see them on that computer. IMAP keeps your emails on the server and syncs them across devices, so you see the same messages on your phone, tablet, and computer. Most people should choose IMAP.

Can I add an Outlook.com account to Outlook?

Yes. Outlook.com accounts (including Hotmail addresses) add to Outlook the same way as other accounts. You enter your email address and password, and Outlook connects automatically in most cases.