Case studies

How Formula Inbox diagnosed inbox placement failures and what it took to recover them.

6 engagements

Staffing and Recruiting

0% → 100%Microsoft 365 inbox placement

7 daysTime to resolution

A Staffing Firm's Microsoft Email Went From 100% Spam to 100% Inbox in Seven Days

Read case study

Professional Services

0% → ~100%Google inbox placement

0.2% → >2%Reply rate

A B2B Services Firm's Outbound Open Rate Went From Under 10% to a Sustained 48%

Read case study

Media Brand

50.33%Average open rate

0.001%Spam complaint rate

A Cold 50,000-Contact List, Relaunched to a Sustained 50% Open Rate

Read case study

Book Publisher

30% → under 1%Bounce rate

62%–69%Open rate

From 30% Bounces to 62% Opens: Unwinding a 30,000-Profile List-Bombing Attack

Read case study

Staffing and Recruiting

100% → 0%Delivery error rate

ClearedGmail 550-5.7.1 block

Their DNS Was Compromised. 28,000 Fake Pages and a Gmail Ban Were the Symptoms.

Read case study

D2C Telehealth

0% → 100%Gmail inbox placement

0.53% → 0.05%Spam complaint rate

A Telehealth Brand's Open Rates Went From 13% to 73% and Held There for Seven Months

Read case study

See what an engagement like these costs.

Audit, Fix, Monitor and Infrastructure engagements.