How to setup mail redirect with just DNS MX/TXT records:

  1. Create a new MX record for your domain that points to redirect.ovh.net.
  2. Create a new TXT record for your domain that uses prefix.at. as subdomain and the target mail as TXT value.

For example: If you want to redirect info@customdomain.com to private@gmail.com The TXT record should look like this: info.at.customdomain. TXT target@gmail.com