Set Up SPF and DKIM for Your Sending Domains A positive reputation for your domain builds trust and improves deliverability, affecting whether your emails are caught by spam filters and how quickly the receiving servers will accept mail from your domain.
This means you maintain control over the emails that affect deliverability for your domain. With authentication handled by your domain, reputation with the receiving ISPs is influenced by your domain and the emails sent on behalf of your domain. When you add authentication information to your domain, an added benefit is that many ISPs use authentication to track sending reputation. We can also ensure that all messages sent from our IPs pass SPF checks. By default, email is authenticated for the domain, but all Transactional Email accounts support DKIM for your domain so you can authenticate as your domain instead. Since there are pros and cons to the various methods, Transactional Email automatically adds authentication for all of the methods mentioned above. DKIM and DomainKeys embed information within the email, making it harder to forge (but they can also be harder to implement for senders and receivers). These are easy to implement, but some suggest they aren't as secure. SPF and SenderID allow a domain owner to add a file or record on the server that the recipient server cross-checks. There are many authentication methods, but there isn't a single one that's the best. Authentication helps legitimate senders prove that their email isn't forged, and can help receiving servers like ISPs and corporate email servers control inbound spam. If you've ever received an email claiming to be from your bank, PayPal, or a company you do business with, but it's really from someone else, then you've seen first-hand how easy it is to forge email. SPF and DKIM AuthenticationĪuthentication is a way to prove an email isn't forged. Transactional Email automatically authenticates all emails sent through our servers, but by adding DNS records to your domain, Transactional Email can send on your behalf and digitally 'sign' your emails.
Learn more about SPF and DKIM and domain verification, or manage sending domains in your Transactional Email account. You'll need to add SPF and DKIM records and verify ownership of your sending domains before you can send email through your account. Transactional Email will not send any email from unverified domains or domains without valid SPF and DKIM records, including public domains like, , and more.Ī message that is rejected with the reject reason unsigned indicates that the sending domain hasn't been properly set up, and that your account is unable to send and authenticate email from that domain.
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