Google Mail Fetcher
Mail forwarding can cause blacklisting when a large number of emails are forwarded and then marked as spam. This can negatively affect your server's mail forwarding reputation, To avoid this risk, you can utilize mail fetching. With mail fetching, you can mark email as spam on the remote server without routing that email through your server.
- From your Gmail account in the browser, select the gear icon in the top right corner of the page, then click "Settings".
- Select "Accounts" and find the "Check mail from other accounts (using POP3)" subsection.
- Select "Add a POP3 mail account you own".
- Enter the complete email address that you wish to fetch mail from.
- Click "Next Step".
- Enter the password for the email account.
- Choose port 110 for POP3.  For secure connections, use port 995.
- Select the checkboxes for the options you want; you can archive incoming messages, label them, force a secure connection, leave a copy of fetched messages on the server.
- Click "Add Account".
