Applies ToOutlook for Microsoft 365 for Mac Outlook 2024 for Mac Outlook 2021 for Mac Microsoft365.com Microsoft Office

What customers are asking

1. Open Outlook for Mac.

2. Select View > Sidebar.

Select View > Sidebar to see your list of folders

1. In the sidebar, choose the Sent folder.

2. Select Organize > Arrange By > To.

Sort your mail in different ways by clicking Organize > Arrange By > and selecting from the list of options

Error code 3253 means that your connection to the email server failed or was dropped. You might need to update your version of Outlook.

1. In Outlook, click Help > Check For Updates.

2. If an update is found, download and install it.

3. Restart Outlook.

4. If the problem continues, click Help > Contact Support.

You might be offline. On the Tools tab, make sure the Online/Offline toggle switch is set to ON.

If the problem continues, your message might have an attachment that's too large to send. See Email doesn't send.

Offline/Online slider on the Tools tab

Most popular topics

Set up Outlook

Update your password

Sync your Google account with Outlook

My message doesn't send

Turn off Focused Inbox

Import email messages and contacts

Archive messages

Where's my outbox?

Add holidays to your Outlook calendar

Search your mail, calendar, and contacts

Topics by category

Troubleshooting   

Why can't I see all my groups?

I can't send or receive messages

I'm not receiving email or other items in my Exchange account

I can't connect to my Exchange account

Outlook for Mac crashes or runs slowly

Signatures, BCC, and Messages   

Focused Inbox

Create and insert a signature

Add or remove folders

Send automatic Out of Office replies from Outlook for Mac

Use Bcc

Recall a message

Delay or schedule the delivery of email messages

Request a read receipt

Calendar, Meetings, and Appointments    

Share your calendar

Open a shared Exchange calendar

Create a meeting or appointment

Open a shared mail, calendar, or people folder

Gmail, iCloud, IMAP, and POP   

Import iCal or Address Book items

Compatibility with iCloud?

Basic IMAP account settings

Basic POP account settings

Office 365 community forums

Ask the community Post, discuss, and find answers

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See Also

​​​​​​​What version of Outlook do I have?

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