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Sometimes, you need to send an urgent message to someone, but you find that your Outlook emails get stuck in the Output without getting delivered to the recipient at the other end. This situation can be a real headache for anyone looking to send emails quickly.

In this blog, you will learn about some common reasons for Outlook emails being stuck in Outbox and different possible solutions to tackle this issue. These solutions will help you avoid this frustrating issue in the future. Even if you still face this issue, we will also recommend professional software to overcome it.

Instant Solution

Try automated tool Kernel for OST to PST Converter to solve damaged OST files due to emails getting stuck in Outbox error

Why do emails get stuck in Outbox?

There are a few reasons for Outlook Outbox not sending emails and getting stuck. Some of the major reasons are listed below-

  • Emails get stuck due to large attachments, i.e., the attachment size exceeds the size limit allowed. This can either halt or slow down the sending process.
  • The mail server or Outlook becomes offline due to weak internet connectivity or bandwidth.
  • Due to email authentication settings, the screen forged emails i.e., verifying or checking that the email is from the actual sender only, and the malicious or deceptive emails are blocked.
  • Opening and viewing the same email in Outbox, which is in the process of sending.
  • The email is marked as viewed in the Outbox due to an installed add-in.
  • The mail server does not authenticate the Outlook account or the absence of a default email account.
  • The mail server or Outlook becomes offline.
  • Incorrect send/receive settings or typing a wrong email account password.
  • The antivirus or anti-spam installed on your system prevents you from sending messages.
How to send emails that got stuck in Outlook Outbox?

After knowing all the possible causes of the Outlook emails getting stuck in the Outbox issue, let’s discuss different methods with a proper step-by-step guide to fix this problem.

Note: Before starting with any methods to troubleshoot Outlook Outbox not sending email issues, ensure you have stable internet connectivity. Slow or poor connectivity may hinder sending emails, especially with large attachments.

Method 1: Change the Outlook connection status

Before focusing on techniques for resolving the problem, check the mail server’s state. If the mail server is offline, your email messages will remain in the Outbox folder until the server’s state changes to online.

To change the mail server state, follow the below steps:

Step 1: Look at the bottom right-hand corner of Outlook. You will see Connected or Connected to Microsoft Exchange. If it is “Connected,” 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 the Send/Receive tab and click on Work Offline to turn it off. Now, send the email again.

Disable Work Offline status

Step 3: Still, if the status remains Disconnected, check the internet connection, and set it right.

Method 2: Try Resending the Email:

If you still face the issue even after the first method, you must try sending the emails again, but this time, ensure you are connected to the server, besides confirming the internet stability.

Decreasing the number of attachments in the mail is another option to be considered. If doing so makes the mail leave the Outbox folder successfully, then your problem is solved.

Try Resending the Emails

Method 3: Check the email settings

You may even check the email setting to see whether you have set the mode of ‘send later’ or ‘delayed sending’. Such a delayed sending setting will result in the showing of Outlook emails stuck in Outbox. Either remove this setting or wait till the time of sending is reached.

Method 4: Look for changes in the password

Sometimes, Outlook emails get stuck in Outbox because of different passwords of the email account and Outlook account. Thus, if you change the password for your email account, you must also change the password for your Outlook account.

To change the password for either Outlook or your internet email account or Outlook data file, follow the below steps:

  1. Open Outbox, click on File and then click on Account Settings.
  2. Click on the account to which you want to change the password.
  3. Click Change, then enter the new password.
  4. Now, click on Next, then Finish to complete the process.

To change the password for the Outlook data file, follow these steps:

  1. Open Outlook and right-click on your email account.
  2. Click Data File Properties, then click on the Advanced option.
  3. Now, click on Change Password and enter your old password.
  4. Confirm your new password and click OK.
Method 5: Run Outlook in Safe Mode

Safe Mode allows the user to open any application in a diagnostic mode. It enables eradicating all the minor troubles and interference via add-ins and, later, safely opens the Outlook application. Press the Windows and R keys together, type outlook/safe, and click Ok to run the command.

Method 6: Update Outlook & Office Apps

Updating the office apps is one of the universal solutions to fix most Outlook problems, including emails stuck in the Outbox Outlook issue.

To update the apps, follow the steps given below:

  • Open Outlook & tap on the File tab. Go to Office Accounts.
  • Click on the Update Option and tap on Update Now.Access Outlook
  • The new Office updates will take some time to be downloaded and all your ongoing issues with Outlook will be resolved.Resolve Outlook issues
Method 7: Antivirus issues with outgoing email:

If you find yourself having trouble sending emails due to your antivirus program, start by checking for updates on your antivirus manufacturer’s website. Forums and user communities may also hold relevant solutions and workarounds. While disabling email scanning may also aid in resolving the issue, don’t be anxious about doing so, as this option is mostly an extra safety measure.

Furthermore, most modern antivirus software will continue to monitor incoming files, including email messages and attachments, regardless of whether the email scanning option is turned on or off.

A timeout can also help resolve the issue; try heading over to Account Settings, then More Settings, and click on the Advanced tab to set this up.Antivirus issues

Method 8: Try an automated OST Conversion software

There are many other manual methods, including reducing the size of attachments and inputting the password every time you change it. You can also try the 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 user’s requirement.

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.
    Search option to find the file
  3. Once the OST file is successfully added, click Next.
    OST file is successfully added
  4. 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.
    save thhe file
  5. Select PST from the list and click Next.
    Select PST from the list
  6. Now, add desired filter options like metadata, item type, and date range to move only specific data to the PST file. Then click Next.
    add desired filter options
  7. 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.
    Split option
  8. Next, click on the Browse option to provide the saving location for the converted file, choose the Saving Preferences and click Finish.
    Saving Preferences
  9. The conversion of the OST file to the PST file will start and be completed soon.
    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.


When users experience Outlook Outbox not sending their emails, they sometimes get stuck in the Outbox without being delivered. 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. However, you can fix this issue using the above-discussed methods. These solutions will help you quickly resolve emails get stuck in Outbox issue. Still, if you face this issue, we recommend trying OST to PST Converter software.

Q- Why is my email getting stuck in the outbox?

A- There are several reasons why emails stuck in Outbox, including a bad internet connection, incorrect server settings, or large attachments. It is essential to troubleshoot these issues using the above solutions to get your emails back on track. 

Q- How long does mail stay in the outbox?

A- As a technical matter, the length of time that mail stays in the Outbox folder of Microsoft Outlook is dependent upon one factor only: whether or not you have initiated a send/receive operation. Until you start the process, email messages will remain in the Outbox.

Q- Does outbox mean sent?

A- For email users, the Outbox is a familiar term that denotes the folder where outgoing emails are stored temporarily until they can be successfully sent. This is particularly useful when there are unforeseen issues that prevent the email from being sent, such as internet connectivity problems or a recipient’s mailbox being full. The Outbox ensures that emails are not lost & can be resent at a later time. 

Q- Where one can find Outbox option in Outlook?

A- On the left-hand side, other options can be visible below the Inbox. These include Sent, Trash, Archive, and Spam. When the issue of email getting stuck becomes a reality, the Outbox option gets visible. It stays highlighted until the email is successfully sent/received.

Q – How to delete an email stuck in Outlook’s Outbox

A – You just need to click on Send/Receive visible at the top right-sight as Outlook is opened. Then in the navigation panel, click Outbox. Now, the email can be deleted from the Outbox.

Kernel for OST to PST