What to do when registrants do not receive emails - SPF/DKIM/DMARC Failure

When sending out emails via Certain, you may receive reports that registrants are not receiving emails from the event. If this happens, there are a few items to review and steps you may need to take to ensure that emails are received.

Troubleshooting Steps

History Record Shows Email Was Sent - Registrant Still Did Not Receive

FROM Address

Email Content

Note: If an email is Bounced back or Blocked by a receiving email server, the event contact (REPLYTO address) will receive an email notifying you that the email was "Undeliverable". If the email is sent to their Spam folder or Quarantined by their Server, no email will be received by the Event Contact.

SPF/DKIM/DMARC Failure

If your emails are not passing the security checks or are getting bounced back because they failed DMARC checks, then you need to review the FROM address that you are using. You would have two options:

The REPLYTO address will still be the event contact and the FROM Name will be the Contact Name.

Configuring your Account to use the Default Certain FROM address

1. Navigate to Account Settings > Implementation > Security Settings.

2. Under Other Settings, select Use event-information@certain.com next to Set Email FROM value to:

3. Click Save.

Using Your Own FROM Address

If you are using your own FROM address, you need to make sure that the email passes security checks (SPF/DKIM/DMARC). To do this, you will need to reach out to Certain Support to get the information needed to set this up properly. The Support team will provide you with 3 DNS entries that you would need to make/add to your FROM addresses Domain. You would then apply these entries to your DNS host to alert your email server that emails sent from that address are legitimate, allowing them to pass SPF/DKIM/DMARC security checks.

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