Real-time email delivery metrics across major providers
Last updated: Oct 23, 2026 7:00 AM PDT
Current ESP Status
| Provider | P95 Latency (s) | Retry Rate | Trend | Status | Details |
|---|---|---|---|---|---|
| Apple iCloud | 4.10 | 1.1% | ▲ | Degraded | View Details |
| Barracuda | 1.73 | 1.2% | ▲ | Healthy | View Details |
| Comcast / Xfinity | 3.27 | 6.8% | ▲ | Degraded | View Details |
| GMX / WEB.de | 3.34 | 0.0% | ▲ | Degraded | View Details |
| Google Mail | 1.75 | 0.5% | ▲ | Healthy | View Details |
| Microsoft 365 | 1.59 | 0.7% | ▬ | Healthy | View Details |
| Mimecast | 2.00 | 27.5% | ▲ | Issues | View Details |
| Outlook / Hotmail | 1.67 | 0.2% | ▬ | Healthy | View Details |
| Proofpoint | 3.54 | 3.3% | ▲ | Degraded | View Details |
| Spectrum / Charter | 13.98 | 0.0% | ▲ | Issues | View Details |
| Yahoo / AOL | 1.30 | 0.3% | ▬ | Healthy | View Details |
Details for Mimecast
← Back to OverviewP95 Latency (24 hours)
Delivery Issues (24 hours)
Retry and Bounce RatesTop Delivery Failure Reasons (24 hours)
| Reason | Distribution |
|---|---|
| Unknown |
99.9%
|
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.
Need deeper, real-time insight?
- Query ANY domain - not just the majors you see above
- 1-minute granularity
- Slack / webhook alerts the moment a delivery issue arises
- Contact us for more details