Want to shift from Gmail to Zoho Mail? Here’s how to transfer all your emails and other data

Log in to the Zoho Mail admin console (admin.zoho.com). Next, select the migration type – One-Click Migration. Then click ...

This Gmail trick will keep your messages and clear your storage

CNET has the full steps over at its site, but in Gmail you can use the "Forwarding POP/IMAP" tab to forward all your emails ...