When to use this email
An outage or downtime has been fully resolved and service is back
You're sending a follow-up to affected customers after the fact
You want to rebuild trust by being transparent about the cause
Customers expect to know it won't happen again
Tips for making it yours
Lead with the facts: date, duration, and what customers couldn't do
Explain the cause in plain language, with no "technical difficulties" hand-waving
Spend the most words on prevention; that's what restores confidence
Reassure them on data safety if it applies, and invite anyone hit hard to reply
