SavvyCal - Massive spam attack – Incident details

All systems operational

Massive spam attack

Resolved
Partial outage
Started over 1 year agoLasted about 4 hours

Affected

App

Partial outage from 3:38 PM to 7:56 PM

Updates
  • Resolved
    UTC
    Resolved
    This incident has been resolved.
  • Monitoring
    UTC
    Monitoring

    Out of the abundance of caution, user registration is still disabled while we test out our abuse prevention mechanisms.

  • Identified
    UTC
    Identified

    Between the hours of ~4:40am and 9:30am (Central Time), emails that SavvyCal attempted to send to users were paused by our email sending provider. We are now processing the backlog of these delayed emails.

  • Investigating
    UTC
    Investigating

    SavvyCal is experiencing a distributed attack from spammers seeking to abuse our email sending infrastructure. We are currently working to mitigate the attack and send emails that have been delayed.