SAP Knowledge Base Article - Public

3656799 - Error 550 5.7.520 Access Denied When Forwarding Emails For Automatic Ticket Creation

Symptom

  • Emails sent to Service Employee fail to create tickets automatically,
  • Error message displayed: "550 5.7.520 Access denied, your organization does not allow external forwarding." 

Environment

SAP Cloud for Customer

Reproducing the Issue

  1. Send an email to the employee address.
  2. The email is automatically forwarded to SAP Cloud for Customer (C4C).
  3. An error message is received stating that the delivery has failed.
  4. Delivery has failed to these recipients or groups:
    cod.b2b.servicerequest@myxxxxxx.mail.vlab.sapbydesign.com
    cod.b2b.servicerequest@myxxxxxx.mail.crm.ondemand.com
    Your message wasn't delivered because the recipient's email provider rejected it.

Cause

• Misconfiguration in the forwarding rule maintained by the user for sales employee mail routing.

• Forwarding rule routes, the email to an incorrect address not associated with the tenant. 

Resolution

  1. The error message "550 5.7.520 Access denied, your organization does not allow external forwarding" indicates that email security settings block automatic forwarding to external domains.
  2. External auto-forwarding is often blocked by Microsoft 365 and other providers to prevent data leakage, phishing attacks, and unauthorized sharing of sensitive emails.
  3. Verify the forwarding rule configured in the user's email system.
  4. Ensure the forwarding rule points to the intended email address for ticket creation in SAP Cloud for Customer (C4C).
  5. If the issue persists, consult the IT or admin team to confirm whether external forwarding is disabled via mail flow or transport rules.
  6. Request the IT or admin team to enable external forwarding for the intended email address. 

See Also

Refer to: Automatic Ticket Creation via Incoming Email

Keywords

Email forwarding error, 550 5.7.520 access denied, automatic ticket creation, external forwarding, smtp error, delivery failed, email routing, forwarding rule configuration, c4c ticket creation. , KBA , LOD-CRM-SC-EML , Email , LOD-CRM-ELM , Email Blast , LOD-CRM-SRP , Service Request Processing , Problem

Product

SAP Cloud for Customer add-ins all versions ; SAP Cloud for Customer core applications all versions