For some users, e-mails do not arrive without manually sending and receiving them. If you are having sync issues, you can force a reset cached Exchange mode manual sync by selecting the Sync button via the View tab on the Ribbon. A status message appears at the bottom of the message list while Outlook is syncing.

Repair your classicOutlook program

And in most cases, that’s where it belongs. For more information on creating a new email profile, see Create an Outlook profile. Please go to Reset a forgotten Microsoft account password for solve Office 365 mailbox sync delays more information.

Make sure you are connected to the Internet

For more information, please go to Sync to manually check for new mail and to send messages in Outlook. Sometimes, an Outlook add-in will crash and prevent your email messages from sending. To disable all add-ins, you can start Outlook in safe mode. If you can send email while Outlook is in safe mode, creating a new Outlook email profile should allow you to send email again.

Check your blocked users list

If you've changed your password on the website for your email account, you'll need to change it in new Outlook, too. Sign up for tips and industry insights to level up your emailing skills. Outlook lets you block a sender or a domain in just a few clicks. This is a great way to protect your inbox from spammers and cyberbullies. If an email triggers the spam filters, Microsoft automatically moves it to your junk folder.

Create a new Profile

For more information, go to Reduce attachment size to send large files with Outlook. I deleted the Yahoo and Google accounts from Outlook and set it up again and that didn't fix anything. I uninstalled the New Outlook app and reinstalled it and that didn't fix anything. I am fairly sure it is something in my Microsoft account since all 4 of my Windows computers stopped working for the email at the same time. I have another Windows computer with a different Microsoft account and that is working fine.

Can't send mail in Outlook.com

• Sometimes, an Outlook add-in will crash and prevent your email messages from sending.
• But still, it’s worth checking if other users are currently experiencing similar issues with Outlook.
• Occasionally, the Outlook program may need to be repaired.
• We've presented the methods in order of quickest to most in-depth.
• For more information, visit Add an email account to Outlook for Windows.
• For more information, go to Reduce attachment size to send large files with Outlook.
• You can repair this file by running the Inbox Repair Tool.

For more information, visit Add an email how to fix Outlook not opening today account to Outlook for Windows. If that doesn't fix the problem, see the next section. To get help and troubleshootother Microsoftproducts and services,enteryour problem here.