Knowing whether mail arrives.
WHY YOU NEED TO
Delivery fails silently.
You do not receive a notification saying your mail went to spam.
WHAT TO MONITOR
Delivery rates, where your sending service reports them Bounce rates Complaint rates Whether test messages arrive
WHAT TO TEST PERIODICALLY
Send to addresses at major providers and check where it lands.
Monthly is reasonable.
WHAT ELSE TO WATCH
A drop in replies or responses Customers saying they did not receive something Enquiries mentioning they had to chase
THOSE ARE SYMPTOMS
Frequently the first indication of a delivery problem.
WHAT TO CHECK REGULARLY
Authentication status in cPanel Email Deliverability Blacklist status DMARC reports, if enabled
WHAT DMARC REPORTS TELL YOU
What is sending as your domain, and whether it authenticates.
WHAT TO DO ABOUT A DECLINE
Investigate promptly. Reputation recovers slowly.
