Today Postmark is launching Domain Verification, a feature that allows users to verify an entire domain for email sending by adding a couple of DNS records. This makes it easier for companies and agencies to send email from multiple addresses on their domain without having to verify each individual address. With Domain Verification, users will automatically get the benefits of DKIM and SPF verification, which can improve deliverability and build reputation. The feature is available for all customers today, and existing customers who have a verified domain with unique DKIM records will be able to send from any email address on that domain immediately.