Port 587 (SMTP)
HoneyLabs honeypots recorded 439 probes against destination port 587 (SMTP) from 167 distinct source IP addresses in the last 7 days.
First observed 2026-08-29 04:35:44, most recently 2026-09-05 01:29:14 (UTC).
Most active source addresses
| Source IP | Probes | Network | Country |
|---|---|---|---|
| 18.116.101.220 | 35 | Amazon.com, Inc. | US |
| 3.129.187.38 | 27 | Amazon.com, Inc. | US |
| 164.52.24.180 | 20 | CDS Global Cloud Co., Ltd | JP |
| 3.130.168.2 | 19 | Amazon.com, Inc. | US |
| 123.58.219.82 | 9 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | HK |
| 156.225.1.17 | 9 | AGOTOZ PTE. LTD. | HK |
| 156.225.1.102 | 9 | AGOTOZ PTE. LTD. | HK |
| 123.58.212.238 | 9 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | HK |
Networks it comes from
| ASN | Organisation | Probes | Source IPs |
|---|---|---|---|
| AS16509 | Amazon.com, Inc. | 95 | 5 |
| AS135377 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | 68 | 8 |
| AS14061 | DigitalOcean, LLC | 33 | 21 |
| AS396982 | Google LLC | 28 | 27 |
| AS9465 | AGOTOZ PTE. LTD. | 27 | 3 |
| AS14987 | Rethem Hosting LLC | 24 | 11 |
Where it comes from
| Country | Probes |
|---|---|
| United States | 243 |
| Hong Kong | 66 |
| Japan | 22 |
| United Arab Emirates | 18 |
| China | 16 |
| Germany | 15 |
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 | 67 |
| Hello from Palo Alto Networks, find out more about our scans in https://docs-cortex.paloaltonetworks.com/r/1/Cortex-Xpanse/Scanning-activity | 28 |
| Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 | 18 |
| Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36 | 13 |
| Mozilla/5.0 (compatible; FlowIQ/1.0; +https://flowiq-labs.com/scanning-info) | 12 |
Port report
Port report
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