How to Fix Outlook Not Responding Sending Email Error

Is your Outlook not responding when sending email? Worry not! We know how important your Outlook email data is to you. That is why, today we are here with the solutions to quickly fix Outlook not responding sending email errors. Let’s get started.

MS Outlook is a highly popular email client used by most organisations and professionals. However, errors like “Outlook not responding when sending email” can be problematic and potentially disrupt the workflow.

Today’s article aims to present you with safe, secure, easy and reliable methods to effortlessly resolve errors encountered when Outlook not responding sending emails. Keep reading.

Why Does Outlook Not Responding When Sending Emails?

• As Outlook’s add-ins do not always turn out to be reliable sometimes lead to the wrong functioning of the program. Outlook archives the Inbox mails for the mailbox’s size reduction. But, mailbox size keeps on increasing with constantly adding up items; thus, struggling to give smooth access to the mailbox, eventually ending up with the “Microsoft Outlook not responding when sending email” error.
• Additionally, any advanced security setting in any anti-virus program prevents Outlook from functioning properly.
• There are other causes too for this error. This error is a frequent one if the Outlook program hangs/freezes while sending emails.

Quick Fix: In most cases, the main reason behind this error is corruption in the Outlook data file (. PST). Therefore, you can try SysTools PST Repair Tool for a one-stop solution. Not just capable of repairing the file, the tool also gives you the option to export the repaired Outlook PST files into different file formats.

Common Causes for Error "Outlook is not responding sending email":

• The MS Outlook program is an outdated one
• The Outlook program is in use by more than one process
• Conflicts in Outlook’s add-ins
• Bulky mailbox
• Corruption in any MS Office program
• Corrupted/Damaged Outlook’s data file or files
• Conflicts of antivirus programs with MS Outlook.
• Corrupted the user’s Outlook profile
• Conflicts of other programs with MS Outlook

Top 10 Tips to Fix Outlook Not Responding Sending Email Error

You can try the following solutions that will enable you to overcome the Error Microsoft Outlook Not Responding When Sending Email in Outlook 2007, 2013:

#Tip 1: Outlook.exe Process End:

1. Use this when Outlook is used by more than one process
2. Start Windows’ Task Manager
3. Press Ctrl + Alt + Del, or right-click the taskbar
4. Select “Start-Task-Manager“
5. Switch to “Processes” tab
6. Click OUTLOOK.EXE to choose it
7. Click the “End Process” button.

#Tip 2: Outlook to be started in Safe mode:

1. Start Outlook in safe mode as it loads without add-ins and any customisation files.
2. Hold the “Ctrl” key down
3. Click its icon
4. Or open the command line
5. Type outlook.exe /safe.
6. Click Yes to confirm to start the program in Safe Mode

#Tip 3: Disable Outlook’s add-ins:

If an error like Outlook not responding when sending an email has come for the first time, then turn off Outlook add-ins.

1. First, go to Tools >Trust Centre > Add-ins. 
2. Finally, click on Go button.

` In MS Outlook 2010 and 2013

1. Start by switching to the File tab
2. Then, click ‘Options > Add-ins > Go
3. Finally, uncheck add-ins
4. Close dialog

#Tip 4: Shut Down Unnecessary Programs

Try closing all programs/applications that are open

#Tip 5: Restoring Outlook Data Files

Try repairing Outlook’s data files: Use the built-in utility, Outlook’s Inbox Repair tool, to scan damaged/corrupted Outlook data files and automatically repair them. But first, you have to find where ScanPST.exe is located.  

• Close the MS Outlook program.
• Navigate to
  

C:\Program Files\Microsoft Office\OFFICE14 folder for Outlook 2010

C:\Program Files\Microsoft Office\OFFICE15 for MS Outlook 2013 version

• Then, double-click Scanpst.exe
• Click “Browse” to select Outlook’s data file
• Open the “Options” dialogue box to choose scan options
• When done, click “Start”
• Initiate the repair process

#Tip 6: Reduce mailbox size

Try creating more than one folder in Outlook, as Outlook will take much more time to display email items from a single folder while the user navigates to another folder. This way, one can organise emails and avoid any errors, such as Outlook freezes when sending an email at the same time.

Compact Outlook’s data file

1. For the MS Outlook 2010 version
2. Go to File tab, then nav to Compact option
3. Under Info > Accounts Settings > Data Files tab > Personal Folder
4. Then, click Settings > General Tab > Compact Now

For Outlook 2013/2010 versions

1. Firstly, right-click the Personal folder
2. Select Data-File Properties
3. Select Advanced
4. Select Compact Now
5. File size can also be reduced by archiving old email items

#Tip 7: Avoid Interruption while Syncing

Synchronisation by Outlook must happen without any interruptions, so while Outlook synchronises mail messages/contacts with other devices, do not perform any action at that time to avoid this error - Outlook not responding when sending email with attachments.

#Tip 8: Disabling Anti-Virus

Disable your antivirus program if it is outdated

#Tip 9: Repair MS Office programs

1. Close MS Office applications
2. Then, open the Control Panel
3. Under “Add or Remove Programs”, right-click on MS Office
4. Then, select Change
5. And then, choose Repair
6. Click the Continue button

If you’re facing duplicates in your mailbox, then we recommend using the SysTools Outlook Duplicate Items Remover, which automatically scans and removes duplicate items from your Outlook mailbox without any data loss. 

In this article, we've explained the best & effortless methods to fix Outlook not responding sending email error. While using manual solutions or automated ways, they will completely help you resolve your challenging problems. Regularly take a backup of your data when changing something in your client.