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Does your ‘Outlook give error 0x800ccc78 when sending e-mail’? This error is known as the 0x800ccc78 error sending or receiving Outlook. It was found that when this error occurs, the user mainly restarts his Outlook without knowing the real cause. This error basically indicates that the wrong input of the outgoing server details is incorrect.

So, here we will talk about various possible methods to fix the Outlook error 0x800ccc78. But let’s first look at the possible reasons for this error.

Causes of Microsoft Outlook Error 0X800CCC78

One can’t expect to solve this error if one doesn’t know the actual reason behind it.

So, let’s find out the reasons.

• SMTP Authentication
• Mail Relay
• Sending email from an invalid email address
• Webmail

How to Resolve or Fix 0X800CCC78 Error

Typically, an Outlook error needs to be corrected quickly because it can cause a variety of problems. Now, given this error message, it indicates the bad entries of the outgoing server details.

It’s actually a much easier solution than you think. Here are some simple and free manual methods to solve the 0X800CCC78 error.

Method 1

1. Open the MS Outlook
2. In the tool button – select the Account Settings option, double-click it.
3. Click on the “Email” tab and choose the email account that displays an error.
4. Now click on the chosen e-mail to access the “Other Settings”.
5. Click on the outgoing server and check the box “My current server requires authentication”.

Method 2

If the first way does not work for you, you can also resolve the MS Outlook 0X800ccc78 error by following these steps:

1. Open the MS Outlook
2. In the Tools button, select the Account Settings option, double-click it.
3. Now click “Next” to view the next email account or change “Email Account Settings”.
4. Double-click on the “Email account settings” in question.
5. Click on “More” settings option.
6. Hit on the “Advance” tab Look at the port nu