Steps to Fix ‘Outlook gives Error 0x800ccc78 When Sending Email’

“Trying to connect Microsoft Outlook or while using it, I got this error:
Sending reported error (0x800CCC78): “Unable to send the message. Please verify the email address in your account properties. The server responded: 5.0.0. access denied.”
I restarted my system thinking that the error may get resolved, but got no success. Please help me out in resolving this error. ”

Are your ‘Outlook gives error 0x800ccc78 when sending email’ ? This error is commonly known as Outlook sending or recieving error 0x800ccc78. It has been seen that when this error encounter user mainly restart their Outlook without knowing the actual cause.

This error basically notifies that the wrong input of Outgoing Server detail.

So, here we will talk about various possible methods to fix Outlook error 0x800ccc78. But first let us discuss possible reasons for getting this error.

Reason for Getting Outlook Error 0x800ccc78

This error mainly comes when there is something wrong with sending authentication of emails. Internet Service Provider aka ISP is responsible for sending or receiving the data as it defines the port values for the synchronization of networks by which this sending/receiving process is done. By default, the port number is 25 for transferring emails from Outlook.

But the problem occurs when ISP blocks their port number and changes it to another. When ISP blocked port number 25 and enabled 587, Outlook error 0x800ccc78 occurs.

Another case is when there is uncheck on “My Outgoing Server (SMTP) Requires Authentication”. Make sure to enable it, otherwise, you will not allow transferring emails on the network.

So we have discussed two different scenarios of getting Outlook error 0x800cc78. Let us discuss how can you resolve them.

“Outlook Gives Error 0x800ccc78 when Sending Email”: Resolved

Follow below listed instructions to resolve this error quickly.

Method-1 : Enable SMTP option

It could be the possibility that your “My outgoing server(SMTP) requires authentication” option is disabled. Enable it by performing the below steps:

• Open Microsoft Outlook and Click on Tools and Click on “Account Settings”

 

• You will get Account Settings window, on that Click E-mail option.

 

• Window of Add New E-mail Account will appear, Click on More-Settings..

 

• You will get the ‘Internet E-mail Settings’ screen, Click on the Checkbox of “My outgoing server(SMTP) requires authentication” and “Use same settings as my incoming mail server”.

• Click Ok.
• Now, restart the Outlook application and try sending email again.

Method-2: Change Port Number to 587

Another possibility of getting “Outlook gives error 0x800ccc78 when sending email ” is that Port number has been changed by ISP, Change it by performing following steps:

• Open Outlook Application. Click on Tools and Select Account Settings.
• In Account Settings window, click on Change
• Click on the More Settings on Add New E-mail Account and Click on Advanced tab.
• You will see Port numbers of IMAP and SMTP, Set the port number 587 for Outgoing Server (SMTP) and Click Ok.
• Click Next and the Finish.

Method-3: Repair PST File

The above method will definitely resolve your “Outlook error 0x800ccc78” but, if somehow it gets failed, then it could be the possibility that your PST file is inconsistent. Check this by performing the following steps: The first thing the Inbox Repair Tool prompt is the location of the PST file to scan.

Use the inbuilt scanpst.exe in Outlook and fix the minor issues. If the error still persist, use below tool to extract complete data from damages PST file and save it in new and healthy file.

Use Software to Fix The PST File Error

The manual method is nice approach to fix Outlook data file corruption, But before using this tool first users have to locate where Scanpst is located. Also Microsoft clearly mentioned that the scanpst is not able to fix major corruption issues. So in that case you can try SysTools Outlook PST Repair Tool.

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The tool gives you the option to repair any level of corruption. Also, the tool provides you the option to repair encrypted PST files too.

- IMAP
C:\Users\admin\AppData\Local\Microsoft\Outlook\ost.ost

- POP3
C:\Users\admin\Documents\Outlook Files\pst.pst

In Outlook 2010 & below versions, it creates 2 PST files, the path of these PST files are as follows:

 - IMAP
C:\Users\admin\AppData\Local\Microsoft\Outlook\pst.pst   
C:\Users\admin\Documents\Outlook Files\pst

• Now, Open Outlook , go to the location where your file is present and Double click on the SCANPST.exe and Open it.

 

• Now Browse the location of PST you want to scan or enter the name of PST manually.

 

• Click on the Start button to initiate the scanning of that uploaded PST file.
• Scanning process get started to check the consistency of the file.

 

• If your file is inconsistent it will generate the details on the next window.
• Click on Repair option if your file is inconsistent. Or if the file is Consistent it will generate a prompt ensuring your PST file is healthy.

Also Read: Resolved 0x80070002 Outook Error Code in Windows

Conclusion:

“Outlook gives error 0x800ccc78 when sending email ” is one of the common error users faces while sending emails in Outlook. It can easily be fixed if you get to know the cause of this error. The blog discusses various possible reasons of getting Outlook error 0x800cc78 and different possible resolution to fix this error.