General Technical Information & SPF

General Technical Information & SPF Essential steps to ensure email delivery!

SPF (Sender Policy Framework) is an anti-forgery system, designed to detect and block email spoofing. An SPF record is associated to your company’s domain (ex: ) to determine whether or not an email server (your Centercode platform) is permitted to send email showing your email domain as a sender. So when using the Centercode platform to send emails, a Centercode email server is sending email on your behalf, often listed as "from" your domain (ex: 

If your domain’s SPF Record does not include Centercode’s email servers, emails sent out by you may land in users’ spam folders (soft fail) or be rejected by your own domain’s validation (hard fail).

Ensuring Reliable Email Delivery

Please add the below to your SPF record to allow Centercode to send emails on your behalf.

v=spf1 mx ~all


Centercode Service IP Addresses

If you find that your IT isn’t comfortable with whitelisting Centercode’s hosted infrastructure to send emails on your behalf, we offer the option to narrow access by using a specific IP address or range of specific IP addresses to send emails on your behalf. This option instead allows your specific hosted infrastructure to send emails on your behalf, rather than approving all of Centercode’s infrastructure. 

That said, if your Centercode implementation is upgraded to a different infrastructure, you’ll need to update the existing IP address with the IP of the new infrastructure or emails may soft / hard fail again depending on your SPF records configuration. If you need a specific IP or range of IPs to enable this, please submit a request using our in-site chat or email Please include the details of your request, and we’ll help you get this configured.

Checking SPF

If you’re encountering any issues with email delivery or would like to verify your domain’s SPF record is configured, please utilize this free third-party web tool to check:


  1. Use the orange dropdown and select SPF Record Lookup
  2. Enter your sending domain, like if your sending email is
  3. Hit enter or click SPF Record Lookup
  4. Look for or the IP address provided to you by Centercode Support

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