Do you know how to fix this error?
In this article fromMiniTool, we will discuss the reasons for this and the corresponding solutions.
Why Does Invalid Certificate Happen?
Why Outlook cannot send encrypted emails?
There are several common reasons that could cause Outlook encryption problems.
With that understanding, you’re able to better take the following tricks.
How to Fix Microsoft Outlook Cannot Sign or Encrypt This Message?
How do you patch up the error that Outlook cannot send encrypted emails?
According to the basic causes mentioned above, we will show you several simple and easy solutions.
Then look for theSSL/TLSsettings for the rig.
Step 3: Go toOutlookand click theFiletab.
Step 4: UnderAccount Information, clickAccount Settingsand selectAccount Settingsfrom the following menu.
Step 5: From the pop-up window, click theChangetab and choose theMore Settingsbutton.
Step 6: Select theAdvancedtab from the new window.
Then you’re able to see if the configured ports are wrong.
Change it based on your situation and clickOKto back up your change.
Do you know what SSL certificate and SSL certificate error are?
How to fix SSL certificate error?
Lets find solutions in this post now!
Remove Add-ins from Outlook
Outlook encryption problems may be due to third-party plugins installed on your Office.
Deleting those add-ins may be an optional way to fix the error.
Step 1: Launch your Outlook, choose theFiletab, and click theOptionstab from the left pane.
Step 2: Locate theAdd-instab from the left menu and look for theManagesection at the bottom of the window.
ClickGonearCOM Add-insto open a new window.
Step 3: Uncheck all the third-party add-ins and click theRemoveoption.
After finishing, clickOKto preserve your changes.
Also read:How to Install and Manage Add-ins in Microsoft Outlook
3.
Step 1: fire up the Outlook desktop program and select theFiletab.
Step 2: Choose theAccount Settingsbutton and clickAccount Settingsfrom the drop-down menu.
Step 3: Select your email account and choose theChangeoption in the E-mail section.
Step 4: ClickMore Settingsfrom the new window.
Then choose theAdvancedtab and check the Server Port Numbers.
If required, replace the number ofOutgoing server (SMTP)with other port numbers.
ClickOKto save all the prefs.
Meanwhile, we hope you’ve got the option to find one way that can give you luck.
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