How does the Gmail mailbox accept other mail?

Open "Gmail" in the browser, click on the "gear" in the upper-right corner of Gmail, and expand the list to select "Set".

After clicking on the "Settings" screen, click on the top to select "Account and import". In the account and import, users can see a "check mail from other accounts," and click "Add a POP3 mail account that you have" in this option.

After clicking, the user fills in the e-mail address that needs to be received. Then click "Next".

Click Next, you can set up the receiving mailbox, in the Settings users need to fill in the mailbox password, POP server address and port, after setting this information, users can click "Add Account". Once you have added your account, your Gmail inbox can receive mail from other mailboxes.