Why do emails still show a Recurly bounceback address when using my SendGrid integration?

Why does the 'Sender' header reference Recurly?

• The "Sender" header in customer-facing emails includes a `recurly.com` domain.
• This is most noticeable in clients that display extended header details (e.g., Outlook).

How do I verify my SendGrid setup?

• Go to Settings → Email Delivery → SendGrid in your Recurly admin and make sure your API key is entered correctly.
• Log in to your SendGrid account and check that email events (such as deliveries and opens) are recorded there. This confirms that emails are being routed through your custom SendGrid setup.
• Open the email headers of a recent message and locate the `Sender` field to inspect its value.

How can I remove the Recurly bounceback address?

• The `Sender` header is included by default to handle bounceback routing. However, if you'd prefer to hide the `recurly.com` reference:
• Contact Recurly Support and ask for the feature flag “Send Email Through Custom Domain” to be enabled.
• Once active, this removes the `Sender` header from outgoing messages, helping align the message headers with your brand identity.

How do I test if the changes worked?

• Send yourself a new transactional email and inspect the headers again.
• You should no longer see a `recurly.com` address in the `Sender` field.

What should I check if the issue persists?

• Double-check that the feature flag was saved and is active.
• Provide Recurly Support with a recent account or invoice example so they can review delivery logs.
• Note: If the email was generated before the flag was enabled, it may still include the old header.

• In rare cases, further investigation by Recurly Engineering may be required. Support may ask for complete headers and example emails to escalate internally.

   

  For more details, visit our documentation on Recurly Docs: Email Deliverability.