Last Updated: 2026-03-11

Incident Response

When Something Goes Wrong

We handle sensitive data: your business email. We have a documented incident response plan that covers what to do when things break, and more importantly, how we tell you about it.

How fast we respond

SeverityAcknowledgeNotify
Critical: data breach, full outage30 minutes24 hours
High: partial degradation, security anomaly4 hours24 hours if affected
Medium: minor issue, no data at riskNext business dayOn request

How we tell you about breaches

If your data is compromised, we tell you directly, in plain language, not legalese. What happened, what data was affected, what we're doing about it.

We also notify the relevant data protection authority within 72 hours when required by GDPR. For regulated clients, we can contractually commit to shorter notification SLAs.

After every incident

Every significant incident gets an internal post-mortem within one week: what happened, why, how we're preventing it from happening again. Affected customers receive a summary of relevant findings.

Found a vulnerability?

Email security@onbox.ing. We acknowledge reports within 48 hours, triage within 5 business days, and fix critical issues within 30 days. We don't take legal action against good-faith security researchers.