Add a CNAME record

Login to your domain provider and add this CNAME record in the DNS editor.
Host / Name Value
mail mail.postale.io.

That's it! Once the new record has propagated you'll be able to:

  • Access the webmail from https://mail.yourdomain.com.
  • Access SMTP, POP, and IMAP email servers from mail.yourdomain.com, in place of mail.postale.io in email client settings.
  • Use mail.yourdomain.com in DNS MX records and autoconfiguration records, in place of mail.postale.io.

And yes, everything still works over SSL/TLS. 🙂

Please note that for SMTP, only port 465 (implicit TLS) is available in this way. Port 587 (STARTTLS) is not. Implicit TLS is the recommended standard anyway.

You can additionally customize the appearance of both the webmail and the admin panel, as part of the white labeling feature (e.g. brand name, logo, ...). Look at the resellers' guide.