1. Open your Gmail Account
2. Click Settings (gear icon at upper right corner) > Settings
3. Click tab "Forwarding and POP/IMAP"
4. At "POP Download" section, select Enable POP for all mail or Enable POP for mail that arrives from now on
5. Click Save
- Settings for Incoming Mail (POP) Server:
pop.gmail.com, Requires SSL: Yes, Port: 995
- Settings for Outgoing Mail (SMTP) Server:
smtp.gmail.com, Requires SSL: Yes, Requires TLS: Yes (if available), Requires Authentication: Yes, Port for SSL: 465, Port for TLS/STARTTLS: 587
FYI...
Reference for Gmail Setup POP in this link: https://support.google.com/mail/answer/7104828