Adjust email security settings to prove emails sent from Salesforce are trustworthy and stop them from being filtered as spam.
Confirm Spam Filter is the Issue: Check the Email Log Files in Salesforce Setup. If the log shows "Status: Delivered," but the recipient never saw it, the email was likely filtered into spam.
Check Your Domain Signature (DKIM): In Setup, type and click DKIM Keys. Find your company's domain and check the Status. If it says "Inactive" or "Pending," ask your IT or Domain Administrator to ensure the CNAME records provided by Salesforce were added correctly to your company's DNS server.
Check Sender Policy (SPF): Ask your IT or Domain Administrator to check your company's official DNS Records (this is done outside of Salesforce). They must ensure the Salesforce SPF Record is correctly added to your DNS settings. Remember: You must only have one SPF record, so combine Salesforce into your existing record if needed.
Test Deliverability: In Salesforce Setup, type and click Test Deliverability. Send a test email to an external address (like a free Gmail or Outlook account). If the email arrives and is not in the spam folder, the issue is resolved!
Troubleshoot Delivery Problems for Salesforce Emails: https://help.salesforce.com/s/articleView?id=000386389&type=1
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