To connect Microsoft Outlook 2016/2019 to the mail server:

1. Click the File menu item. Under Info > Account Information > Click Account Settings and Click on Account Settings.. and then click the New... button.
2. On the New Account screen, just choose Manually configure server settings or additional server types and click Next.
3. Choose Internet E-mail, connect to POP or IMAP server to send and receive e-mail messages and click Next.

4. Here give the User information, enter your Name, your full email address.

   Under Server information,

   Account Type – IMAP, POP

   Incoming mail server – example.com

   Outgoing mail server (SMTP) – example.com

   Also enter the logon information, enter your user name in full (mailboxname@postofficename) and enter the password.

5. Now go to Outgoing server tab and check My outgoing server (SMTP) requires authentication and choose Use same settings as my incoming mail server.

6. Click Ok and Finish.