Alex Xu on Twitter: "3. The Gmail server stores the email and makes it available to Bob, the recipient. 4. Gmail client fetches new emails through the IMAP/POP server when Bob logs
How to Configure Gmail POP Settings
How do I update my POP mail server settings? – Support | one.com
SMTP and POP3 - smtp mail server - professional SMTP service provider
POP3 vs IMAP comparison. How to setup Gmail using IMAP & POP3? - Mailtrim
Difference Between Outlook POP3, SMTP & IMAP Connections