Real-time email delivery metrics across major providers
Last updated: Jul 30, 2025 11:30 PM PDT

Current ESP Status
Provider P95 Latency (s) Retry Rate Trend Status Details
Apple iCloud 2.60 0.0% Healthy View Details
Comcast / Xfinity 1.13 4.2% Healthy View Details
GMX / WEB.de 1.86 0.0% Healthy View Details
Google Mail 0.66 1.2% Healthy View Details
Microsoft 365 1.62 1.8% Healthy View Details
Outlook / Hotmail 1.50 0.0% Healthy View Details
Spectrum / Charter 0.77 0.0% Healthy View Details
Yahoo / AOL 1.72 0.0% Healthy View Details

Details for Google Mail

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P95 Latency (24 hours)
Delivery Issues (24 hours)
Retry and Bounce Rates
Top Delivery Failure Reasons (24 hours)
Reason Distribution
Mailbox over quota
96.1%
Content rejected (spam/policy)
1.6%
Invalid address (user doesn't exist)
0.9%
Network error (timeout/refused/reset)
0.6%
Temporary resource unavailable
0.5%
Account disabled/inactive
0.2%
Unknown
0.1%

About this data

  • The numbers on this page come from SMTP telemetry that Groups.io collects each day.
  • Latency measures the time from the start of the connection until we receive the server's response to the DATA command.
  • Metrics are updated every five minutes and down-sampled into 5-minute buckets; raw data older than seven days is automatically purged, and roll-ups are kept for 90 days.

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