What deliverability problems actually cost.
Mail that bounces or lands in spam never gets a chance to convert. Adjust the five inputs to match your program and see the monthly and annual revenue at stake.
Your program
Total volume across all campaigns and lifecycle mail.
Hard and soft bounces combined. Healthy is under 2%.
Delivered but never seen. Often invisible without seed testing.
Average order value, or lead value for B2B programs.
Share of delivered, inbox-placed mail that converts.
Estimated revenue lost
$356,400 per year, if nothing changes
Where it goes
Sends lost
30,000
Conversions lost
660.0 / mo
Fail rate
15.0%
Estimate only. Assumes lost sends would otherwise have delivered, been opened, and converted at your stated rates.
Where the leak usually starts.
No DMARC policy
Mailbox providers increasingly sandbox or reject unauthenticated mail outright, inflating both bounce and spam rates at once.
Check DMARC →
SPF over the lookup limit
Past ten DNS lookups, SPF returns PermError, which breaks DMARC alignment even when DKIM is fine.
Check SPF →
Sending IP on a blocklist
One blocklisted IP or shared range can push spam-folder rates into double digits overnight.
See monitoring →
Fix the cause, not just this month's number.
ZeroHook tracks SPF, DKIM, DMARC, blocklist status and bounce trends daily, so the number above trends down and stays down.