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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: mjlinden on February 25, 2021, 03:07:30 AM

Title: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: mjlinden on February 25, 2021, 03:07:30 AM
I receive the following Microsoft Outlook errors about 70% of the time when the Avast shields are enabled. These errors prevent me from sending/receiving email. Outlook just keeps retrying every few minutes. The errors do not occur when the Avast shields are disabled. Disabling the Microsoft Outlook Avast Add-in has no effect on the problem.

"Task 'blahblah@comcast.net - Receiving' reported error (0x800CCC1A) : 'Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.'"

  Any ideas on how I can get Avast to play nice with Microsoft Outlook?
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: r@vast on February 25, 2021, 12:56:09 PM
Hi,

Are you using the latest version of Avast 21.1?
Are your email settings set up according to your email provider's instructions: https://www.xfinity.com/support/articles/email-client-programs-with-xfinity-email
Please also see this article.  https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_win10-mso_365hp/error-code-0x800ccc1a/2202b756-6354-4718-acb1-6337052e76cd
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: mjlinden on February 25, 2021, 11:53:04 PM
  Yes, using latest Avast 21.1.

  My server settings are clearly correct because I only have problems when Avast is enabled. Avast enabled = MS Outlook errors occur. Avast disabled = MS Outlook operates correctly with no errors. Avast is clearly interfering with MS Outlook operation as I only have Outlook problems when Avast is enabled.

   Thanks, Michael
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: r@vast on March 02, 2021, 11:30:20 AM
Hi,

This behaviour might occur when the Avast Mail Shield certificate is not configured correctly. While this might not be an issue for the communication between Outlook and the mail server, it might be an issue when Avast Mail Shield is involved. Can you please specify which specific version of Outlook you are using, and please provide a screenshot of your server configuration settings in Outlook?
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: mjlinden on March 07, 2021, 09:59:05 PM
  While I appreciate your help, it's just not worth this much trouble. It took me five minutes to switch to Bit Defender and the problem has been solved.

  Thanks, Michael
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: dvc on September 17, 2022, 11:54:10 PM
Did not have this problem for years, UNTIL Avast updated program and virus definitions.
Now using Outlook 2003, any attempt to send or receive via Gmail errors, as described by other users.
Disconnecting shields for either outlook.pst or www.gmail.com does not fix the issue.
Disabling Avast shield DOES.
This proves that the issue is caused by the new Avast version.
Would like to know of any other solution before leaving Avast, thanks!
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: r@vast on September 19, 2022, 10:49:07 AM
Did not have this problem for years, UNTIL Avast updated program and virus definitions.
Now using Outlook 2003, any attempt to send or receive via Gmail errors, as described by other users.
Disconnecting shields for either outlook.pst or www.gmail.com does not fix the issue.
Disabling Avast shield DOES.
This proves that the issue is caused by the new Avast version.
Would like to know of any other solution before leaving Avast, thanks!

Hi,

Would you mind trying the beta version, please? A New fix for the Mail Shield issue has been released to beta.
1. Uninstall the stable version
2. Restart your computer
3. Download and install the new beta
4. Restart your computer
5. Check if you can send and receive emails
Download links for the new beta can be found here: https://forum.avast.com/index.php?topic=321149.0
Title: Re: Avast Causes Microsoft Outlook Send/Receive Errors When it is Enabled
Post by: dohc on February 18, 2023, 04:09:27 PM
Hi,

I am using Avast One Free 23.1.6049.  Until last week I had been using Outlook 2016 and Avast without any problem.  From Wednesday I started getting the 0x800CCC1A error and was unable to sync my Gmail accounts.  I tried various fixes I read about on the net but none worked.  Out of the blue I disabled the Avast shields and all my emails flooded in.  I could continue to disable the shields to sync my mail but a fix would be great.  Has there been any more information on the cause and remedy for this?

With thanks, Brian