MX record
A DNS record that says which server receives email for a domain or subdomain.
How this affects you
Your main domain's MX records point at your inbox provider, and Vaartix never touches them. Vaartix adds one MX record on your return-path subdomain (vxmail.yourdomain) that points at Amazon SES (feedback-smtp.ap-south-1.amazonses.com), so bounces have somewhere to go. That's why the return path has to be a subdomain that doesn't already receive email.
Learn more
Vaartix is a transactional email API built in India. SPF, DKIM and a return path on your domain are set up for you, and every feature is free during the private beta.