What to Do When Emails Get Stuck in Outbox?

Pooja Chaudhary | Updated On - 13 Oct 2021 |

Read time 7 min

You may sometimes have noticed that your emails are not displayed in Sent items even after sending them. Or simply, the email was not delivered to the recipient. The situation may remain the same even after multiple sending attempts. And it badly impacts email communication.

Emails getting stuck in Outbox is a very common issue faced by many Outlook users. And many times, the email sending process takes a lot of time, and the message gets trapped in Outbox. Sometimes, Outlook displays error messages also. Also, this issue is seen in all Outlook versions.

Why do Emails Get Stuck in Outbox?

There are many possible reasons for Outlook not being able to send emails.

Here, we have noted the most common reasons due to which emails get stuck in Outlook Outbox.

  • Emails get stuck due to large attachments that halt or slow down the sending.
  • The email is marked as viewed in the Outbox due to an installed add-in.
  • The Outlook account is not authenticated by the mail server.
  • The mail server or Outlook becomes offline.
  • The send/receive settings are incorrect, and the email sending gets halted.
  • Outlook is in use with another program.
  • Outgoing emails are scanned by an antivirus program.

How to Send Emails that Got Stuck in Outlook Outbox?

After knowing all the possible causes of the problem, let’s see how to resolve it easily. Let’s try these methods one by one.

Method 1: Change the Outlook connection status:

Before moving to the resolution, check the state of the mail server. If the mail server is offline, your email messages will remain in the Outbox folder until the server state changes from offline to online status.

You can quickly check and change the state of the mail server with in a few simple clicks.

Step 1: Look in the right-hand corner of Outlook. You will see Connected or Connected to Microsoft Exchange. If it is “Connected,” then the problem is not related to the server status.

Check Connected or Connected to MS Exchange

Step 2: Suppose the state is Working Offline, then go to Send/Receive tab and click on Work Offline to disable it. After doing this, you will have to send the email again.

Disable Work Offline status

Step 3: If the status is Disconnected, check the internet connection and set it right.

Method 2: Try Resending the Email:

If the email is stuck in the Outbox folder, you must try sending it again. If it leaves the Outbox folder successfully, then your problem is solved.

Try Resending the Emails

Method 3: Try an OST Conversion Tool:

There are many other manual methods apart from the ones mentioned above, like reducing the size of attachments and inputting the password every time you change it. You can also try Inbox Repair Tool as Outlook stores all the information in the OST file.

If none of the manual methods works well to resolve the problem, using the Kernel for OST to PST tool is highly recommended. The tool works proficiently to resolve corruption and damages in OST files. The OST to PST converter tool works effectively even on large-size OST files and splits them as per the requirement of the user.

Get an idea of the Kernel for OST to PST software working with these procedural steps.

  1. Launch the installed Kernel for OST to PST tool on your system.
  2. On the Welcome Screen, click Browse to add your OST file directly from the system folder location or use the Search option to find the file in the specific drive.
  3. Search option to find the file

  4. Once the OST file is successfully added, click Next.
  5. OST file is successfully added

  6. All the mailboxes’ content within the OST file will get retrieved. Select any OST file folder item to view its complete content preview. After this, click the Save option from the top menu.
  7. save thhe file

  8. Select PST from the list and click Next.
  9. Select PST from the list

  10. Now, add desired filter options like metadata, item type, and date range to move only specific data to the PST file. Then click Next.
  11. add desired filter options

  12. Use the Split option to split your converted PST file into multiple small-sized PST files with a specific size interval, attach a prefix to converted files if you want and click Next.
  13. Split option

  14. Next, click on the Browse option to provide the saving location for the converted file, choose Saving Preferences and click Finish.
  15. Saving Preferences

  16. The conversion of the OST file to the PST file will start and be completed soon.
  17. OST to PST  conversion start

The process is easy to perform, and you can try it using the free trial version available to download on the software website.


In this blog, we discussed the situation when emails get stuck in the Outbox in Outlook. After explaining the issue briefly, we discussed the reasons due to which it may occur. When Outlook users try to send emails, sometimes they get stuck in Outbox without being sent. This error may occur due to many reasons like incorrect Send/receive settings, offline mail server or Outlook, Outlook in use with another program, and so on. They may get error messages too. We then discussed the solutions to this error one by one. Users can try to resend emails, try to change the connection status of Outlook, or any manual method that fixes their issue. If not, they can try OST conversion tools to fix the issue. Hope this blog helped you fix your issue.

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Watch Video: To View the complete process of OST to PST Conversion