Outlook Error 0x800ccc78 Unable Send Message – How to Fix?

“Outlook Error 0x800ccc78 Unable Send Message” is one of the Outlook errors which become a matter of concern for many professionals. While sending an important Email or chatting with a hot lead online, if you see an error saying: “Sending reported error 0x800CCC78: “Unable to send the message. Please verify the email address in your account properties”, how would you feel??? You will frustrate, of course. Most of the users tap the “X”(Cross) button of MS Outlook and refresh it again assuming things will go back to normal. But, it doesn’t happens. Fixing Outlook Error 0x800ccc78 Unable Send Message is not that simple. You have to gain some technical knowledge to fix such outlook errors. In this article, we will learn about a simple yet effective method to fix 0x800ccc78 Outlook Error. This method helped a lot if users, and it may help you too. So, let’s get started.

How to Fix Outlook Error 0x800ccc78 Unable Send Message

Step-1: Go to “Tools” and select “Account Settings”

Step-2: Account Settings window will appear on your screen in which you can see various tab like

  • Email
  • Data Files
  • RSS Feeds
  • SharePoints List
  • Internet Calendars
  • Published Calendars
  • Address Books

Click on the first tab i.e. Email

Step-3: Now select any email address to which you are not able to send message and getting Outlook Error 0x800ccc78 Unable Send Message

Step-4: Doing so, User Information alongwith Logon Information and Server Information will be displayed on your screen. All you need to do is click on “More Settings” button given at the lower right end of that page

Step-5: In this step, “Internet Email Setting” Window will appear with following tabs:

  • General
  • Outgoing Server
  • Connection
  • Advanced

Click on “Outgoing Server” tab

Step-6: Once you click on Outgoing Sever option, you will see “My Outgoing Server(SMTP) Requires Authentication option in the drop down menu. Just check this box and click OK to end this process.

This is how you can fix Outlook Error 0x800ccc78 Unable Send Message in 6 easy steps.

Hope this works for you.

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