The Outlook email client on the computer cannot find the email server due to different reasons. Read further to know about the causes of the problem and the solutions to fix them.

Verify the server settings

• Step 1: When you try to receive or send an email, the account communicates with the IMAP or POP or SMTP servers. If the server settings are wrong, then finding the email server becomes difficult. 
• Step 2: Launch the Outlook application, click the Tools menu, and select Accounts.
• Step 3: Select your email account in the dialog box and check if the incoming and outgoing mail servers information are correct. 
• Step 4: Select More Settings and then go to the My Outgoing server tab to make sure the authentication for the outgoing server is set properly.
• Step 5: In the Advanced tab, check if the incoming and outgoing server port numbers & encryption type are correct.

Turn off the firewall 

• Step 1: Sometimes, the firewall settings of the system might prevent the email server connection for security purposes. This will cause the cannot find the email server.
• Step 2: Use the below steps to disable the firewall and then try to connect to the email server.
• Step 3: Open the Control Panel window on the computer by searching for the ‘control panel’ in the search bar.
• Step 4: Select the System and Security menu and click the Windows Defender Firewall link on the right-side panel.
• Step 5: Next, click the Turn Windows Defender Firewall on or off link from the left side panel.
• Step 6: Select the radio button Turn off Windows Defender Firewall (not recommended) to disable the firewall.
• Step 7: After that, click OK to apply the settings.

Increase server timeout