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Test the Deliverability of Emails Sent Through Salesforce
When a user sends an email through Salesforce, the email is routed through one of a number of possible Salesforce IP addresses. If the email’s recipient blocks any of these IP addresses, the email might not be received. It’s hard to test whether your customers are receiving emails from all possible Salesforce IP addresses. However, using the Test Deliverability feature, you can easily send an email to yourself from each of the potential Salesforce IP addresses. If you receive all emails, then you aren’t blocking any of the Salesforce IP addresses.

