Mailgun added a slew of new features to its email validation API including target mailbox validation, role-based address check, disposable mailbox, reporting, and rate limits. Additionally, Mailgun added the API under its existing SLA and has transitioned to a tiered, usage-based pricing model.
Twilio introduced a new Fax API in Beta. The API allows connected apps to both send and receive faxes to and from legacy fax machines. While the API might seem counterintuitive, the business reality of today's marketplace continues to see many businesses across industries rely on fax communication.