However, it could also be something a bit more complicated.
Walking through common troubleshooting steps can help you fix Outlook not sending emails.
Right-tap the email stuck in the outbox, point toMoveand choose theDraftsfolder.
fire up the email in the Drafts folder and clickSend.
Check to see if the message is now in the Sent folder or still in the outbox.
Look at the lower-right corner of the Outlook window.
If it saysDisconnected,Working Offline, orTrying to connect, you are not connected to your email server.
Click theSend/Receivetab on the ribbon.
ClickWork Offlinein the Preferences group.
You should now seeConnected to Serverin the lower-right corner of the window.
Click theSend/Receive All Foldersbutton in the Send & Receive group.
Sync Your Password
ClickFile>Account controls>Account controls.
Choose your email account and clickChange.
input your updated password in thePasswordbox.
SelectNext>Close>Finish.
Select theSend/Receive All Foldersbutton in the upper-left corner of the Outlook window or pressF9to try sending your email.
Repair Outlook
It’s possible your Outlook system is damaged.
Use the built-in Microsoft Office repair utility to fix it.
Repair Outlook 2016, 2013 or 2010 in Windows 10
Close all Microsoft Office applications.
TypeApps & Featuresinto the Windows search box.
Find and click onMicrosoft Officein the list of installed apps and features.
SelectOnline Repair>Repair.
Restart Outlook when the repair process is complete.
Repair Outlook 2016, 2013 or 2010 in Windows 8
Right-click theStartbutton.
Make sureCategoryis selected in the View By list.
ClickUninstall a Programunder Programs.
SelectOnline Repairif it is available (this depends on the punch in of Microsoft Office you have installed).
ClickRepair>Yesif a user account control window appears.
Repair Outlook 2016, 2013 or 2010 in Windows 7
Click theStartbutton >Control Panel.
SelectMicrosoft Officefrom your list of programs.
First, verify you are connected to the internet.
after you snag confirmed your connection, verify you are working online in Outlook.
To do so, go to the Outlook menu, check to see if Work Offline is selected.
If so, click Work Offline to remove the check mark and work online.
Empty the Send Folder
Empty the folder to clear “stuck” messages.
Any message you delete must be re-createdit cannot be recovered or undeleted.
Delete all of the messages in the folder.
Try sending an email to see if the issue is resolved.
Rebuild the Outlook Database
Using the Microsoft utility to rebuild a corrupted database might fix Outlook.
Back up any Outlook data storedonlyon your machine before you rebuild the database.
Quit all Microsoft Office applications.
Hold down theOptionkey and then click theOutlookicon in the Dock to launch the Microsoft Database Utility.
tap the identity of the relevant database.
Restart Outlook when the process is complete.
Start by deleting any unwanted email messages from the inbox, then right-clickJunk Mailand clickEmpty.
Alternatively, increase your sending limit by updating security options.
Another reason your email may not be sent is that you recently changed your email password online.
Internet and Wi-Fi issues will also cause issues sending Outlook emails.
