.: These email clients can be used with POP and IMAP to handle your email expertly, retaining email message copies on your Mac rather than on the cloud or webmail servers. An advantage of these clients is that you can often migrate your messages to a different email client if you decide you want to change in the future. You can likely import your current Outlook messages into a new client, and vice versa. If you have multiple email accounts, look for clients that can handle multiple addresses.: If you don't need an offline email client on your Mac, you can use these free webmail services to manage your email online from any web browser or computer, regardless of the (i.e. Whether it's Mac, Windows, etc.).
Not sure if you found the information you are looking for. It is possible to change the send and receive scheduled time from 10 minutes to something of your choosing. Open your Outlook and go to Outlook > Preferences > Schedules and place a check in the box next to send & receive all.