Internet Service Providers (ISPs), like Google, Yahoo, and Microsoft, use DKIM and SPF authentication as a way to scan incoming emails for spam or spoofed addresses. Emails that fail authentication are more likely to arrive in a spam or junk folder.

To help ensure your campaigns reach your recipients' inboxes and to make your campaigns look more professional, you can set up custom DKIM authentication for your domain, and add Clever Elements to your SPF record.
​
​If you have absolutely no idea what any of this means, print this out and give it to your IT group

If you have access to and can modify your DNS, add this bit of code to your SPF text record to enable SenderID Authentication for all your campaigns:

For example, your SPF record might look something like this: