Cpanel Email Setup and SSL set up

looking for an expert to set up a cpanel email system for my client. Need to ensure SSL set up and security settings to properly work. need to be able to set up email on gmail as secure also and be able to forward emails. also need to import contacts from old cpanel server to new addresses for about 6 emails. All emails are currently set up on new server but the ip address they login into is not showing as a secure link. They are having issue setting up a secure outgoing incoming on their gmail accounts. They are also having intermintent issues with receiving emails. Then today their main email info@ was seemingly hacked and thousands of spam emails were sent out under their account. So looking for basic help to properly ensure emails are set up. Many little simple fixes for cpanel email set up.