Outlook not sending emails on Windows 10 [Solved]

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Fix outgoing mail issues with Outlook and Windows 10

Many users running Microsoft Office have reported various issues resulting in the inability to send email through Outlook since upgrading to Windows 10. Although the issue has been clearly identified, there is no patch available from Microsoft to fix the issue.

Right click on the start button
Choose ‘Command Prompt (Admin)‘
Then choose ‘Command Prompt (Admin)’ from the context menu. Or Press (Windows Key+R)
When command prompt has opened, simply enter the following: sfc /SCANNOW

The analysis will begin and may take up to 20 minutes to complete. Once the scan is finished, just restart your computer and this problem will be resolved.

Let’s fix Outlook email sending issues :-

Change your email provider
Check if TCP/IP protocol is enabled
Create a new email profile
Turn on authentication

Check if TCP/IP protocol is enabled :

If you still have problems, even if you switched to another profile, you can check if TCP / IP is set as the default protocol. Here’s what you need to do:

Go to Search and type ncpa.cpl and hit Enter
Right click on your internet connection and go to properties
Under the Networking tab, make sure Internet Protocol Version 6 (TCP / IPv6) is checked, if not, check it
Click OK.

Turn on authentication :-

Select the Tools menu in Outlook > go to Email Accounts
Click View or change existing e-mail accounts > Next
Select an email account > click on Change > More Settings
Go to Outgoing Server tab
Check the option My outgoing server (SMTP) requires authentication.
Select the option Use same setting as my incoming mail server > hit OK > Apply > Finish

Create a new email profile :-

There’s a possibility that your email profile is corrupted, so you can try with creating a new one. Here’s what you need to do to create a new email profile for Outlook.