What is Outlook Error 0x800ccc78 and How To fix It?

MS Outlook is used by most of users for emailing and quite similar purposes such as contact management, calendaring, meetings, appointments, etc. Because it is a popular email client, most of the users have queries regarding its functioning, performance and sometimes about Outlook errors.

One of the general error that users face is Outlook error 0x800ccc78 which don't allow users to send emails even after hitting on send/receive button. This error message conflicts the sending/receiving of emails in Microsoft Outlook .

Basically, this error is somewhat similar to the error "Sending/Receiving (0x800ccc78)…….Access denied". This error generally appears in Outlook when email address entered by you to send email is rejected by the SMTP server. Some other causes related to this error are an incorrect or invalid recipient, incorrect registry settings, missing of important files like dll.exe, vxd, ocx etc., spyware attacks and incorrect Outlook account settings.

Note: It is highly recommended to timely scan your PC using computer cleaner programs available on the online market, So that these types of issues can be avoided in future. Meanwhile, here is list of Outlook tasks that get affected when your Outlook comes in contact with error 0x800ccc78.

  • User is unable to send or receive emails via Outlook
  • Unable to store elements like emails, contacts, etc. in a PST file
  • Slow performance of Outlook

How Fix Outlook Error 0x800ccc78?

Well, as an Outlook user, this is an annoying situation when emails are not being sent through Outlook. Therefore, a user must have to find a way to fix such types of problem. To do so follow the below mentioned steps:

In MS Outlook, go to "Tools" and click on 'Account Settings'. It will display your email account settings.

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Now click on 'Change' icon > More settings > Outgoing server.

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Now just check 'My outgoing server SMTP requires authentication' and press 'Ok'.

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Note: Don't make use of "Test account settings" option as it results in failure of all settings.

If using above method fails to solve the Outlook error 0x800ccc78, then you likely have to choose a secondary method i.e. repair Microsoft Outlook Data File. Manual method can only work to some extent. But sometimes the level of these errors is much higher and repairing could be the right choice in such scenarios. To apply repair process, proceed as per the below suggested steps:

Simply, browse the corrupted PST and begin the repairing process.

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If a PST file is victimized by a minor error, then Outlook Inbox Repaitr Tool probably proves as a prominent solution and notify you about the existence of error while performing repairs through the given message "'Errors found in this file'. In opposite case, when the level of PST File corruption is at its peak level, running "scanpst" has been marked as a failure because it fails to repair MS Outlook Data file ultimately.

Fix All Types of Microsoft Outlook Errors

Recover Outlook Data file utility is helpful for users as it renders the facility to recover corrupted PST files which is being affected through various errors and now are inaccessible. In addition, the tool also recovers deleted Outlook emails without any type of data loss issues.

This tool possesses dual scanning options to scan data of corrupted PST files (Quick and Advanced scan). Quick scan is the default feature of scanning and used to extract data from less corrupted PST Files or file having minor corruption issues. Whereas, advanced mode requires user's permission to work. A user have to enable "Advaned Scan" button in order to parse Outlook PST file from more secure or severe scanning procedure. In addition, the tool also provides multiple options to save PST file data in EML/MSG/PST file formats as per users need.

Always close Outlook properly so that the data saved within a PST file does not suffer any kind of functional issues. Also, don't forget to use anti-virus programs for defeating harmful virus in your computer system.