SMTP attacks & scanning (port 25/587)
Mail transfer — open-relay abuse and credential probing.
Observed by OffSeq honeypot sensors · last 30 days · #7 most-attacked service · last seen 4 minutes ago
528,861
Attacks
3,042
Distinct source IPs
25/587
Port · tcp
The #7 most-attacked service across the fleet in the last 30 days.
OffSeq honeypots emulating SMTP recorded 528,861 attacks from 3,042 distinct source IPs over the last 30 days. Mail transfer — open-relay abuse and credential probing.
Top CVEs exploited across the fleet (last 30 days)
Fleet-wide, not scoped to SMTP.
- CVE-2017-01442,731
- CVE-2019-07082,655
- CVE-2024-45771,682
- CVE-2021-268551,652
- CVE-2017-9841542
- CVE-2025-5777269
- CVE-2023-3519150
- CVE-2012-212283