Outlook Error Code 20

How to fix error code 20 on Outlook – Windows Report

Matthew is a freelancer who has produced a variety of articles on various topics related to technology. His main focus is the Windows OS and all the things surrounding it. He is passionate about… Read more
Updated: Apr 1, 2020
Posted: October 2017
Error code 20 is an error message that occurs when you’re trying to send emails using Outlook. This issue occurs when the software can’t connect with the proxy error can often be due to a laptop’s or desktop’s date and time settings. Check if that Windows is displaying the correct time and date. Outlook errors are, unfortunately, pretty common, but you cannot let this ruin your day. Go to our Outlook errors section for a complete list of possible errors and you still didn’t find the solution, check our Fix Outlook issues category for more articles.
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Error code 20 is an error message that occurs for some Outlook users when sending emails.
When they try to send an email, the application returns this error message, Outlook is unable to connect to the proxy server (error code 20).
This issue occurs when the software can’t connect with the proxy server. So does that error message sound familiar? If so, here are a few potential resolutions for error code 20.
How can I fix error code 20 on Outlook?
1. Check Windows’ Date and Time Settings
Error code 20 can often be due to a laptop’s or desktop’s date and time settings.
Check that Windows is displaying the correct time and date. If not, this is how you can configure the date and time settings in Windows 10.
Click the Cortana button on the taskbar, and enter date & time in the search box.
Select Date & time settings to open the window shown directly below.
To manually configure the date and time, switch the Set time automatically setting to off if it’s currently selected.
Press the Change button to open the window directly below.
Then configure the date and time settings there as required, and press the Change button.
You might also need to replace the desktop’s or laptop’s CMOS battery, which keeps the time.
Check out this post for further details on how to fix the system clock in Windows.
2. Run a System File Checker Scan
The System File Checker tool in Windows fixes corrupt system files. Error code 20, like many other software issues, can be due to corrupted system files. This is how you can scan system files with the SFC tool in Windows.
Press the Win key + X hotkey, and click Command Prompt (Admin).
First, enter /Online /Cleanup-image /Restorehealth in the Command Prompt; and press the Return key.
Then input sfc /scannow in the Prompt’s window, and press the Enter key to initiate the scan.
When the scan is complete, restart the OS if Windows Resource Protection repaired some files.
3. Run an Anti-Virus Scan
It might also be the case that a virus or malware is responsible for error code 20. There are myriad third-party anti-virus utilities you can utilize to scan for viruses.
If you don’t have any anti-virus software currently installed, run an anti-virus scan with Windows Defender as follows.
Press the Cortana button to open that app’s search box.
Enter ‘Windows Defender’ in the search box, and select to open the Windows Defender window shown directly below.
Click the shield icon on the left of the window to open scan options.
Press the Quick scan button to open further settings.
Then select the Full scan option for the most thorough scan.
Press Scan now to initiate the scan.
You might be also interested in our article about 9 best antivirus software with encryption to secure your data
4. Turn off Firewalls
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Windows and third-party software firewalls block software from making connections.
Thus, a firewall blocking Outlook could be responsible for the code 20 error, which is a proxy server connection issue. This is how you can switch Windows Firewall off.
Enter the keyword ‘Windows Firewall’ in Cortana’s search box.
Click Windows Firewall to open its Control Panel tab below.
Click Turn Windows Firewall on or off to open further settings.
Select the Turn off Windows Firewall option and click OK.
If switching the firewall off resolves the issue, click Allow an app or feature through Windows Firewall on the Windows Firewall tab.
Press the Change settings button, and then scroll down to Outlook in the listed software.
Click both Outlook‘s check boxes if they’re not currently selected.
Press the OK button to close the Allowed applications tab.
Select the Turn on Windows Firewall option, and press the OK button.
Your third-party anti-virus utility might also have a firewall that’s blocking Outlook.
To switch its firewall off, right-click the anti-virus utility’s notification area icon on the right side of the taskbar.
You can usually select a disable or stop option to temporarily switch the software off with from the context menu.
5. Reinstall Outlook
Uninstalling and installing Outlook again is another potential fix for error code 20. Reinstalling Outlook will give the application a fresh configuration and replace its program files.
You can uninstall the software by pressing the Win key + R hotkey and entering in Run.
Then click OK, select Outlook on the Programs and Features tab, and press the Uninstall button. Thereafter, restart Windows before reinstalling the email application.
Those are a few fixes that might resolve error code 20 so that Outlook sends emails again.
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Frequently Asked Questions
What is an error code 20?
The Error code 20 in Outlook is an error message that occurs when you’re trying to send emails. This issue occurs when the software can’t connect with the proxy server. If you can’t connect to the proxy server, use this expert guide to fix this problem.
Why am I getting a send/receive error in Outlook?
Windows Firewall and any third party Antivirus program can interfere with sending and receiving emails on Outlook. Therefore, if you want to fix this error, try to disable the Firewall and the Antivirus program.
Where is my outbox in Outlook 365?
Right-click on Outbox and pick Show in Favorites. Now, when you open Outlook via Office365 OWA you will see Outbox displayed under the Favorites menu. If it doesn’t open, we have a guide to help you fix that.

proxy server error code 20, how to fix – Microsoft Community

First, in some cases, the issue is related to a bad time and date setting on your computer.. Check to make sure your computer time and date are correct.. If not, fix them and if necessary, replace your CMOS battery to keep the date correct.
Next, see the link below to make sure the server certificate is up to date and installed on your computer. (It may have changed. ) Generally, contacting the server’s IT folks will allow you to get this fixed quickly.
Error message when Outlook tries to connect to a server by using an RPC connection or an HTTPS connection: “There is a problem with the proxy server’s security certificate”
Hal Hostetler, CPBEBroadcast Engineer/IT ProMVP-Outlook – WA7BGX
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Top 5 Most Common Outlook Error Messages and Their Fixes

Have you ever encountered an error message while working on Microsoft Outlook? Generally, error messages cause Outlook to crash or stop responding. And sometimes errors can also lead to file corruption if don’t get resolved in time. In this article, we’re going to discuss the top 5 common Outlook error messages. Also, we’ll learn how to fix those errors Outlook is a popular email client application used globally for sending and receiving email messages. Apart from being an email application, it has versatile features like create meetings, appointments, tasks, notes, and much more. However, problems in Microsoft Outlook is certain to happen not only because of the failure of the application but also due to software wnload a free version of PST Repair tool to know how to fix errors from Outlook PST files.
Common Outlook Error MessagesWhenever there’s any sort of problem in Microsoft Outlook, you’re likely to face different error messages. Below are the top 5 most common Outlook error messages:#1 – Cannot open your default email foldersLet’s suppose you start Microsoft Outlook, and you come across an unexpected error message that reads, “Cannot open your default e-mail folders. An unexpected error has occurred. MAPI was unable to load the information service Be sure the service is correctly installed and configured. ”The error refers to an issue with the Outlook Hotmail Connector add-in. So this error message is associated with the Outlook Hotmail Connector. It’s a freeware tool provided by Microsoft to access and manage the MSN, Live, and Hotmail accounts by using Microsoft Outlook. There are two certain scenarios in which you may receive this error:Outlook Connector is no longer installedIt seems the Outlook Hotmail Connector is no longer installed on your system, but you still have an MSN/Hotmail account configured with Microsoft Outlook. You have two options here:Either reinstall the Outlook Hotmail Connector again;Or, remove the MSN/Hotmail account from your mail profile if you don’t wish to use it if the latest version of the Outlook Connector is already installed on your system and you still receive this error message, follow these simple steps:First, enable the add-in reinstall the Outlook Hotmail Connector on your system. And then remove the MSN/Hotmail account from the Outlook start Microsoft Outlook and add the MSN/Hotmail account again by using the Outlook Hotmail Connector the account has been successfully created, repair the Office it’s done, recreate your mail profile. #2 – The connection to Microsoft Exchange Server is unavailableOutlook errors are always a bit trickier to resolve, especially this one. The error message reads, “The connection to Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action. ”Being one of the most common Outlook error messages, you may encounter this specific error more than often. The most possible reasons responsible for this error are:No Data ConnectionMaybe there’s no data connection available at the very moment. So you should start by using the Telnet protocol to test your SMTP connection. If you don’t how to do that, you should take help of this guide published on the Microsoft TechNet site: Test SMTP with Telnet. Outlook Data Files are LockedIt may happen that the Outlook data files, i. e. PST and OST files, are accidentally locked, and you have no idea about that. Or maybe the Outlook data files are set to the read-only status. You should better check the permissions of these files, and make sure neither is set to the read-only terference of 3rd Party ApplicationsThere are many 3rd party applications which can interfere with Outlook while it’s being connected to the Exchange Server. If this is the real cause, you should better start Outlook in safe mode. #3 Outlook is unable to connect to the proxy server This particular error message appears when the Outlook client tries to connect to a server by using an RPC (Remote Procedure Call) connection or an HTTPS (Hypertext Transfer Protocol Secure) connection. The error message reads, “There is a problem with the proxy server’s security certificate. The security certificate is not from a trusted certifying authority. Outlook is unable to connect to the proxy server. ” There are various reasons responsible for this Microsoft Outlook error, such asA certification authority is required to connect to the you forgot to trust the certification authority at the certificate seems to be invalid or site’s name ain’t matching with the a 3rd party add-in or browser is causing this order to resolve this Outlook error, there are multiple things you can try:Examine the certificate First, you need to examine the certificate, and then contact your system administrator to resolve this issue. Follow these simple steps:First, connect to the RPC Server or to the secure server in Microsoft Internet Explorer. Type in the address bar, and hit double-click the padlock icon located in the lower-right corner of the web the Details tab, and check the information of these two fields:Valid to This field indicates the date until which the certificate is bject Make sure this field should match the site stall the trusted root certificateYou need to follow these steps to install the trusted root certificate:On the Certificate dialog box, click Install Certificate > check the Place all certificate in the following store box. Then click Trusted Root Certification Authorities, and then click click Next > Finish > OK. Disable the 3rd party add-ins Before you can actually disable any 3rd party add-in, you should start Outlook in safe press Win + R to go to the Run command in the edit box, and hit Outlook starts in safe mode without any problem, this means the real problem is associated with the 3rd party add-ins. Here you need to check for the 3rd party COM add-ins and disable, launch Microsoft Outlook. On the taskbar, click the File tab > Options > COM Add-ins in the Manage box, and then click the checkboxes shown next to the 3rd party add-ins which you want to restart Microsoft portant note: Remember, Outlook uses the Internet Explorer settings for HTTPS requests. If a 3rd party browser add-in is causing this issue, you should try to disable it in the Internet Explorer. #4 – Outlook Send Receive Error 0x800ccc13Generally, most of the Outlook errors come out while sending and/or receiving email messages. The Outlook error 0x800CCC13 is one such common issue often faced by users. It reads, “Sending reported error (0x800CCC13): Cannot connect to the network. Verify your network connection or modem. ”This is the most common Outlook error which can occur in any edition of Microsoft Outlook whether it’s 2016, 2013, 2010, 2007, 2003, etc. Generally, this error message occurs after upgrading Windows 7 or 8 to Windows 10. Those users who’ve recently upgraded to Windows 10 are more likely to come across this common Outlook order to resolve the Outlook error 0x800CCC13, make sureYou’re using Windows 10 Enterprise and Pro 1511 (Build 10586) or any higher for Windows home, you should have version 10 (10240) or any if you’re still receiving this Outlook Send Receive error, maybe the system files are corrupted and you need to repair them. You can use the Windows System File Checker to repair corrupted, close Microsoft right-click the Start in Windows and select Command Prompt (Admin). Note: If you don’t see the option, you can choose Windows PowerShell (Admin) sfc /scannow in the command prompt. This process may take around 20 minutes to scan a regular hard disk. Please wait until the process completes. Once the process is successfully completed, restart your computer and open Microsoft Outlook. #5 – Cannot start Microsoft OutlookMicrosoft Outlook often faces unexpected errors which may lead to severe problems. This Outlook error is the most frequent one that reads, “Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The operation failed. ”There are many reasons associated with this common Outlook error. Maybe the file that maintains the Navigation Pane settings, called, is corrupted. And that’s why you’re receiving this error message. You can find this file in the following folder:On Windows XPC:Documents and SettingsusernameApplication DataMicrosoftOutlookOn Windows Vista & 7C:UsersusernameAppDataRoamingMicrosoftOutlookNote: If you see the XML file size is 0 KB, it’s a strong indication of order to resolve this problem, follow these simple steps:Simply press Win + R to go to the Run command type /resetnavpane in the edit box, and hit the above trick doesn’t fix the problem, you should follow the workaround given below:Make sure that Microsoft Outlook ain’t running in compatibility member that Microsoft Outlook may not start if you’re using an old profile of any older Outlook version. Make sure you’ve created a new Outlook profile and using stalling and reinstalling Microsoft Outlook more than often can also cause this error if done most importantly, if you have a corrupted Outlook data file, you’re likely to receive this error. You can use the scanpst utility to repair PST file. Outlook users may find this helpful: Outlook Troubleshooting – Top 5 Microsoft Outlook ProblemsPST Repair ToolGenerally a corrupted PST file is considered the main cause behind most of the common Outlook error messages. Although Microsoft provides the Inbox Repair tool to repair PST file, it may fail or not work in a case of severe corruption. In such a crucial situation, the PST Repair tool from Shoviv Software is the most reliable solution in the online marketplace. It can successfully scan corrupt PST file and fix all the error messages with almost no manual effort. Via this software, you can repair PST file and restore all your mailbox data into a new file. I strongly recommend users to download its demo version for free evaluation. ConclusionIf we don’t fix the Outlook errors in time, we’re likely to face severe problems sooner or later. In this article, we’ve discussed the top 4 most common Outlook error messages. Also, we’ve learned how to troubleshoot those errors in the most effective way possible.

Frequently Asked Questions about outlook error code 20

What is an error code 20?

Error Code 20 indicates a general network failure. It is a general purpose error which indicates that the underlying TCP connection was forcibly closed for some reason unknown to our application.Apr 16, 2020

Why does my Outlook email keep saying error?

Generally a corrupted PST file is considered the main cause behind most of the common Outlook error messages. Although Microsoft provides the Inbox Repair tool to repair PST file, it may fail or not work in a case of severe corruption.Sep 14, 2021

How do I fix a certificate error in Outlook?

Symptoms. … Cause. … Resolution 1: Examine the certificate for error message 1 or 2. … Resolution 2: Install the trusted root certificate for error message 3. … Resolution 3: Disable the third-party add-in or the third-party browser add-in for error message 4. … More information.Jun 3, 2021