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Why a mailbox was auto-suspended

Updated Apr 1, 2026 · 5 min read

Auto-suspend triggers, how to investigate, how to resume.

On this page · 3
  1. Common triggers
  2. How to investigate
  3. How to resume

Inboxlee auto-suspends a mailbox when seed placement drops below threshold or a blacklist hit appears. This is protective - it keeps the rest of your domain reputation intact while you investigate.

Common triggers

  • Seed placement below 50% for 2 consecutive days.
  • Spamhaus SBL or DBL listing on the domain or sending IP.
  • Bounce rate above 8% over a 24-hour window.
  • DKIM verification failure for more than 1 hour after a record change.
  • Manual suspension by you or another workspace admin.
  • How to investigate

    Open the mailbox page. The Suspension banner shows the trigger reason and links directly to the relevant signal - the failing seed test, the blacklist source, the bouncing recipient list. Click through to see the underlying data.

    How to resume

    Once you have addressed the underlying issue (delisted from blacklist, cleaned the list, fixed DNS), click Resume on the mailbox page. Sending resumes immediately at the appropriate warmup-day cap.

    If the underlying issue is not fixable (e.g., a deeply damaged domain reputation), the dashboard recommends retiring the mailbox and provisioning a replacement on a fresh domain. That is sometimes the right call.