Port 587 (SMTP)
HoneyLabs honeypots recorded 423 probes against destination port 587 (SMTP) from 157 distinct source IP addresses in the last 7 days.
First observed 2026-09-23 13:37:21, most recently 2026-09-30 12:32:11 (UTC).
Most active source addresses
| Source IP | Probes | Network | Country |
|---|---|---|---|
| 3.130.168.2 | 26 | Amazon.com, Inc. | US |
| 18.116.101.220 | 20 | Amazon.com, Inc. | US |
| 216.180.246.51 | 17 | Google LLC | US |
| 3.129.187.38 | 11 | Amazon.com, Inc. | US |
| 156.225.1.34 | 9 | AGOTOZ PTE. LTD. | HK |
| 156.225.1.45 | 9 | AGOTOZ PTE. LTD. | HK |
| 106.75.5.165 | 9 | China Unicom Beijing Province Network | CN |
| 156.225.1.104 | 9 | AGOTOZ PTE. LTD. | HK |
Networks it comes from
| ASN | Organisation | Probes | Source IPs |
|---|---|---|---|
| AS135377 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | 90 | 11 |
| AS16509 | Amazon.com, Inc. | 66 | 5 |
| AS9465 | AGOTOZ PTE. LTD. | 54 | 6 |
| AS396982 | Google LLC | 42 | 25 |
| AS8075 | Microsoft Corporation | 32 | 32 |
| AS14061 | DigitalOcean, LLC | 32 | 18 |
Where it comes from
| Country | Probes |
|---|---|
| United States | 216 |
| Hong Kong | 81 |
| Japan | 16 |
| Brazil | 14 |
| China | 13 |
| United Kingdom | 12 |
Client strings seen on this port
| User agent | Probes |
|---|---|
| visionheight.com/scan Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) Chrome/126.0.0.0 Safari/537.36 | 47 |
| Hello from Palo Alto Networks, find out more about our scans in https://docs-cortex.paloaltonetworks.com/r/1/Cortex-Xpanse/Scanning-activity | 25 |
| Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36 | 20 |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0 | 18 |
| Mozilla/5.0 (compatible; GenomeCrawlerd/1.0; +https://www.nokia.com/genomecrawler) | 16 |
Port report
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