Providing temporary use of online non-downloadable software for preventing email threats, email-based attacks, and email-based data loss; providing temporary use of online non-downloadable software that integrates with email platforms for preventing email threats, email-based attacks, and email-based data loss; platform as a service (PAAS) featuring computer software platforms for preventing email threats, email-based attacks, and email-based data loss; providing temporary use of online non-d...