UniOne Email API UniOne is a transactional email service with Web API for sending transactional and marketing emails at scale (up to 3,000 emails/sec). This skill lets you send emails, manage templates, validate addresses, track delivery, and more. Authentication All requests require the environment variable. Pass it as the header. Base URL: All methods use with JSON body. --- CRITICAL: Domain Setup (Required Before Sending) Emails will not be delivered until the sender's domain is verified. Before attempting to send any email, ensure the domain is set up: Step 1: Get DNS Record Values — API…