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Like other email clients, Microsoft Outlook is prone to software errors, temporary glitches, or third-party software problems. 0x800ccc78 is one of those common Microsoft Outlook errors that may occur due to a number of reasons. Generally, the error indicates a problem with the recipient’s email address in the Reply-To field. However, as said above, it can be due to many reasons.
Open Outlook Express if it is not already opened. Click on the Tools tab and choose Accounts. When in the Internet Accounts window, click to highlight the Mail tab. Click to select your email profile and then press the Properties button. When in Properties, click on the Servers tab. Check the incoming & outgoing mail server settings. If they seem to be wrong, erase them and enter correct ones.
Verify that your account name, which is your full email address and password are typed in correctly. Typo mistakes often create such problems. Make sure that the Log on using Secure Password Authentication (SPA) box is not checked. If it is checked, click to uncheck it. Check my server requires authentication. Now hit the Settings button. Check the radio button beside Use same settings as my incoming mail server. Erase and retype your email address and password in the relevant boxes. Check the Remember password field and hit the OK button to close the Settings dialog box.
You will now return to Properties. If you want to verify whether other settings are correct or not, click the Advanced tab and look through them. Make necessary changes. When done, hit the Apply button and then OK to save and close the Properties window. Close Outlook Express and reopen it. Create a test mail and send it to yourself or any other email address.
Open your antivirus program and update it with latest virus, malware definitions. When done, run a full virus scan of your computer. Prompt the program to delete any infected file brought in the scan results. If your antivirus program did not detect any suspicious item, open your web browser and Google for free online virus scan. You can run Smartpcfixer to fix it automatically. Smartpcfixer is a top-ranking error-resolution registry cleaner which will fix the computer errors and optimize the system settings. You can scan, clean, optimize, and keep your PC much healthier with it!
You can download Smartpcfixer here.
Just run Smartpcfixer, click ‘quick scan’
After the scan is completed, click ‘repair all’ button.
