Why am I getting an email delivery error message when reassigning leads or contacts?
|Knowledge Article Number||000003845|
When I reassign a contact or lead, I receive an error about undeliverable message.
Salesforce sends email from several different IP addresses. If your organization blocks any of these IP addresses, users might not receive all email sent from Salesforce.
To verify your organization can receive email from every Salesforce IP address:
If you do not receive the test messages, your organization's email administrator must whitelist the Salesforce IP ranges on your organization's email server. Please see our What are the Salesforce network IP addresses that I need to whitelist? article for the IP addresses to whitelist.