Fix Outlook crashes when sending an email

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Fix Outlook crashes when sending an email problem has been bothering some users, but fortunately, there are a few things that can be done in order to fix it. Some users are complaining that whenever they try to send a new or reply to an existing email in Outlook, it crashes. If the same problem happens to you, you can try the solutions described below.

How do I stop Outlook from crashing?

If Outlook crashes on your system, you should try to troubleshoot it in the Safe Mode. This will help you identify the faulty Add-in (if any). Apart from that, you may also experience crashing or freezing problems with Outlook if your Outlook profile is corrupted. You can confirm this by creating a new profile. If this fixes the issue, you have to move all your emails from the old profile to the new one and delete the old (problematic) profile.

Fix Outlook crashes when sending an email

If you have a POP3 account and Microsoft Exchange Server mailbox in the same profile, you may experience Outlook crashing. However, even users without an Exchange Server account can suffer from this problem. If Outlook crashes while you’re sending or replying to an email, try these tips to fix it:

  1. Change the delivery location of your POP3 email account.
  2. Troubleshoot Outlook in the Safe Mode.
  3. Reset Outlook AutoComplete list.
  4. Repair or reinstall Microsoft Office.

1] Change the delivery location of your POP3 email account

The problem occurs if you have a Microsoft Exchange Server mailbox and POP3 account in the same profile. The problem also occurs if the folder selected as the default delivery location in your POP3 account does not exist. To fix this issue, you have to change the delivery location in your POP3 email account. The steps to do this are as follows:

  • If Outlook is already running, close it.
  • Launch Control Panel.
  • Select “User accounts” from the View by mode dropdown.
  • Now Click on the Mail option. A new popup window for Mail setup will appear.
  • Click on the E-mail accounts button. This will open your Outlook accounts settings and list all your accounts.
  • In the Account settings window, click on the E-mail tab and select your POP3 email account that you are experiencing the problem with.
  • Click on the Change folder button on the bottom left side.
  • Click OK to select another folder or create a new one. Close all the opened windows and start Outlook.

This should fix the problem. If the issue still exists, there might be an Add-in causing Outlook to crash. To fix this issue, you have to troubleshoot Outlook in the Safe Mode. We have explained the process below.

2] Troubleshoot Outlook in Safe Mode

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If you’re having problems with Outlook, you can try launching it in Safe Mode. This will disable all add-ins, which may help you identify which one is causing the issue. To do this, follow these steps:

  • Close Outlook if it is already running.
  • Press the Win + R keys to launch the Run command box.
  • To launch the Run command box, press the Win + R keys.
  • Select your Outlook profile that you want to launch in the Safe Mode from the drop-down menu and click OK.
  • When Microsoft Outlook is launched in the Safe Mode, there should be (Safe Mode) written on its top.
  • You can now go to File > Options in the Outlook Options window. From there, select Add-ins from the left side.
  • On the right, select “COM Add-ins” from the Manage drop-down menu and click on the Go button. Note the names of the disabled Add-ins.

Now, close the COM Add-ins window and send a test email. If the problem persists, Outlook will need to be run in Safe Mode.

Case 1: One of the add-ons enabled in Safe Mode is causing Outlook to crash.
Case 2: One of the add-ons disabled in safe mode is causing Outlook to crash.

Case 1

Re-launch Outlook in Safe Mode and disable each add-on one-by-one in Safe Mode. Send a test mail after disabling each add-on. If Outlook does not crash after disabling a particular add-on, that add-on is the likely cause of the problem. You can now either leave that add-on disabled or remove it permanently from Outlook.

Case 2

Write down names of disabled Add-ins and exit Outlook Safe Mode. In normal mode, all Add-ins are enabled. You have to disable only those Add-ins which were not enabled in the Safe Mode. After disabling each Add-in, send a test mail. This will help you find the culprit Add-in. Once you find it, you can leave it disabled or remove it.

3] Reset Outlook AutoComplete list

The Autocomplete feature in Outlook shows suggested results as you type in the first letter of an email address. This can save you time when trying to find a specific email address. The suggestions come from Outlook’s Autocomplete list.

The Outlook AutoComplete list feature was causing some users issues which were resolved when the list was cleared or reset. Try this if you are having similar issues.

The steps to clear or reset the Outlook AutoComplete list are as follows:

  • Launch Microsoft Outlook.
  • Go to “File > Options.”
  • Select Mail from the left side.
  • Scroll down the right side until you find the Send Messages section. Click on the Empty Auto-Complete List button.
  • You’ll get a confirmation message after you click “Yes.”

Clear or reset the AutoComplete list in Outlook from the Run Command boxYou can clear or reset the AutoComplete list in Outlook from the Run Command box. The steps for the same are written below:

  • If Outlook is already open, close it.
  • Open the Run command box by pressing the Win + R keys.
  • Open Outlook.exe and type /CleanAutoCompleteCache. This will clear the AutoComplete List data and launch Outlook.

4] Repair or reinstall Microsoft Office

The issue you’re experiencing might be due to corruption in Microsoft Office. Repairing Microsoft Outlook can help in this case. If this doesn’t fix the issue, you can try reinstalling Microsoft Office.

How do I fix Outlook not sending emails?

If you’re not receiving emails in Outlook, first check a few things before troubleshooting. Specifically, you should check:

  • If you’re not able to connect to the internet, you may have problems using Outlook.
  • The receiver’s address that we enter is sometimes incorrect, which causes the “Sending failed” error message on Outlook.

If you’re having difficulty sending emails from Outlook, it’s possible that your Outlook profile is corrupted or that the problem is associated with some add-ins. In such a case, you should troubleshoot Outlook in Safe Mode and repair Microsoft Office. Also, there might be some settings in Outlook that are preventing you from sending emails.

How do I repair Outlook?

Open the Control Panel and repair Microsoft Office from the list of installed programs. Right-click on Microsoft Office and select Change to open a new window. In the new window, select Repair.

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