Thanks for getting in touch with us! SSLs are important for security but they do not affect your incoming spam emails.
The best way to see an immediate decrease in the amount of spam you're getting is to enable the spam filtering in cPanel. Using the cPanel spam filtering, you can have the spam sent to a junk folder and even create custom filters. If you want to set up more advanced configurations, you can also use Spam Experts if you are on a shared hosting plan. If you need any further details, please get in touch with our 24/7 Technical Support team directly!