Email Authentication for ESPs
This page is intended as a quick guide for ESPs (Email Service Providers). For more details, see the Adding a New Domain page.
From header should be what your recipients expect. Do not change it just for email authentication purposes.
From domain using DKIM and Sender ID requires setting up DNS records and knowing all IP addresses that send mail for this domain name. If you can do this, then great! Just setup those DNS records, and you’re done.
If you can’t authenticate the
From domain, then add a
Sender header with an email address at a domain which you can authenticate against.
There are a few options for the
Sender header that we’ve seen used. These examples assume that the
From header is
- Create a sub-domain of your domain:
- Create a sub-domain of their domain:
- Create a completely new domain:
- Use your own domain name for all of your clients:
In all cases:
- You need to setup DNS records for both DKIM and Sender ID for the domain name in the
- A server has to receive email for the domain in the
- If the domain name in the
Senderheader is also being used in the Bounce Address (aka
Return-Path), you’ll also need to configure DNS records for SPF.