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By default, your dedicated IP resolves to a mySMTP hostname such as relay8.mysmtp.com. With branded rDNS, it resolves to a hostname on your own domain instead, for example mail.yourdomain.com.

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Why use branded rDNS

Every sending IP must have active reverse DNS so receiving servers can recognize and identify it. mySMTP handles reverse DNS for all IPs and uses its own configuration and domains by default. Branded rDNS lets you show your own domain instead, which helps you comply with the rulesets some ISPs apply to delivery.
Branded rDNS is only available with a dedicated IP.

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Set up branded rDNS

1

Choose your hostname

Pick a subdomain on your sending domain, for example mail.yourdomain.com.
2

Add a DNS record

In your domain’s DNS, add one of these records:Use your actual dedicated IP or server hostname from your setup email.
3

Tell mySMTP support

Email support@mysmtp.com with the hostname you created.
4

mySMTP completes the setup

When the record is live in a DNS lookup, mySMTP:
  • activates the PTR configuration
  • changes the server Hello banner
  • generates a TLS certificate for your subdomain

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What changes after setup

You now send with your own domain in reverse DNS. Your hostname is only visible in the email header (message source) and in the TLS certificate as an alternative subject name. Recipients do not see it in their inbox.
Confirm the result with the PTR/rDNS Checker in the Deliverability Toolbox, or run dig -x YOUR_IP +short.