How to enable Gmail Setting

Step 1: Enable IMAP and/or POP3

You need to enable IMAP and/or POP3 access in the Gmail account settings before you can access email using IMAP/POP3:

Go to the "Settings", e.g. click on the "Gears" icon and select "Settings".
Click on "Forwarding and POP/IMAP".
Enable "IMAP Access" and/or "POP Download"

Step 2: Enable Third-Party Mail Clients

Google may block (by default) third-party (less secure) mail clients like e.g. Outlook, Thunderbird, MailList Controller or Inbox2DB.

See: https://support.google.com/accounts/answer/6010255?hl=en for details.
The page contains a link to enable "Less secure apps" in MyAccount.
You can also enable "Less secure apps" (third-party mail clients) from:
"MyAccount" > "Sign-in & security" > "Connected apps & sites" > "Allow less secure apps"
Gmail IMAP Server
Enter the following information in the IMAP account settings of your mail client:



Server: imap.gmail.com
Encryption/Authentication: SSL
Port: 993
Username: Your Gmail email address
Password: Your account password

Gmail POP3 Server
Enter the following information in the POP account settings of your mail client:

Server: pop.gmail.com
Encryption/Authentication: SSL
Port: 995
Username: Your Gmail email address
Password: Your account password

Gmail SMTP Server
Enter the following information in the SMTP account settings of your mail client:



Server: smtp.gmail.com
Encryption/Authentication: SSL
Port: 465
or

Server: smtp.gmail.com
Encryption/Authentication: StartTLS
Port: 587