The best and quick solutions to resolve the “Outlook is not sending emails” issue are provided on this page.

Outlook Not Sending Emails

Note: The following troubleshooting solutions apply to Outlook for Mac 2016, Outlook for Mac 2011, and Outlook Online.

Outlook is a free, easy-to-use email client. Setting up and accessing an email account with this client is pretty easy and simple. However, users face some common problems like “Outlook is not sending emails” when using it.

This article covers the causes and the best troubleshooting solutions to fix the Outlook email sending issue.

Resolving “Outlook not sending emails.”

Generally, an email client will not send an email message successfully, if:

  1. Your connection is unstable
  2. The email account settings are misconfigured
  3. The server is busy
  4. The recipient’s address is entered wrongly
  5. The email client status is offline, disconnected, etc.

Whatever the causes might be, you can resolve this problem easily. Changing the email account settings will resolve this issue. But, it is quite complicated. So, before doing that, perform the following procedures one by one to resolve this Outlook problem.

After performing each solution, check if the Outlook problem is resolved. If Outlook is not sending emails again, try the next solution.

Enable “Work Online” – The Best Solution

  1. In most cases, these kinds of email problems occur due to “offline mode.”
  2. So, initially, check to ensure that your Windows or Mac computer (on which you’re using Outlook) is connected to a stable internet connection.
  3. Next, open the Outlook application if it is closed.
  4. Now, check the Outlook status on the main screen of the app.
  5. If the “Disconnected, Working Offline, or Trying to connect…” message is displayed at the bottom of the screen, it means Outlook is unable to connect to the server.
  6. To resolve it, click on the Send/Receive tab.
  7. Choose the Preferences tab followed by the Work Offline option.
  8. Work Offline Option
  9. Enable the Work Online option.
  10. Now, try to send the email message.

Recheck the recipient’s email address

  1. The Outlook client can’t send emails to an invalid or a wrong email address.
  2. So, check whether you have entered the recipient’s email address correctly.
  3. If not, re-enter it and then try to send the email.

Delete the attachments

  1. You can’t send attachments more than 25 MB in size from the Outlook client.
  2. When you try to send more than 25 MB, the “Oops, this email has over 25 MB” or “Can’t send email” message will be displayed on the screen.
  3. Check the size of the attachments. If they are more than 25 MB, delete some attachments and then try to send the email message.

Updating the email password

  1. Whatever changes you make in your email account should be updated in Outlook to avoid problems when using the account with the client.
  2. For example, consider that you have changed your account’s password recently and failed to update it in Outlook. Follow the instructions below to update the account password in Outlook.
  3. Open the File menu of Outlook.
  4. Select Account Settings > Account Settings > E-mail.
  5. Choose your email account’s address.
  6. Click Change.
  7. How do i fix email not sending
  8. Type your account’s new password in the given field.
  9. Type Your Account
  10. Click Next > Close > Finish.

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