The free shared host email that you’re using comes with a hefty price – HIGH SPAM & EASY BLACKLIST.
Because shared host email is sharing the same IP address (location of network and specific devices. For more explanation, see Wikipedia IP Address) with other websites on the same server, high-level spam filters are difficult to calibrate. This means spam emails come in more frequently. Each cPanel on our host does come with SPAM Assassin, but many people find it still doesn’t work to control the number of unwanted emails.
In addition to the high levels of spam emails, if someone sharing your IP address is sending out high levels of spam email and gets their email blacklisted – your email can be blacklisted. This means your emails may not make it past recipients’ server rules.