You can send email to sms/mms to usa carrier and some canada carriers from any email address on your server. Make sure to have PTR (rDNS), DKIM, DMARC and SSL configured correctly. It's recommend to have 35 dedicated IPs per 100k SMTPout/24hrs to carrier SMS/MMS gateways using round robin for IPs or else barracuda and cloudmark will flag ea IP for poor reputation. Also make sure server hostname renamed to none generic and SSL re issued from cpanel for updated security.