Port 587 (SMTP)
HoneyLabs honeypots recorded 387 probes against destination port 587 (SMTP) from 139 distinct source IP addresses in the last 7 days.
First observed 2026-08-08 22:37:42, most recently 2026-08-15 17:16:34 (UTC).
Most active source addresses
| Source IP | Probes | Network | Country |
|---|---|---|---|
| 3.129.187.38 | 28 | Amazon.com, Inc. | US |
| 18.116.101.220 | 27 | Amazon.com, Inc. | US |
| 18.218.118.203 | 20 | Amazon.com, Inc. | US |
| 156.225.1.39 | 9 | AGOTOZ PTE. LTD. | HK |
| 156.225.1.115 | 9 | AGOTOZ PTE. LTD. | HK |
| 156.225.1.33 | 9 | AGOTOZ PTE. LTD. | HK |
| 156.225.1.31 | 9 | AGOTOZ PTE. LTD. | HK |
| 123.58.219.26 | 9 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | HK |
Networks it comes from
| ASN | Organisation | Probes | Source IPs |
|---|---|---|---|
| AS16509 | Amazon.com, Inc. | 99 | 7 |
| AS135377 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | 90 | 11 |
| AS9465 | AGOTOZ PTE. LTD. | 36 | 4 |
| AS396982 | Google LLC | 31 | 26 |
| AS14061 | DigitalOcean, LLC | 29 | 17 |
| AS8075 | Microsoft Corporation | 23 | 23 |
Where it comes from
| Country | Probes |
|---|---|
| United States | 246 |
| Hong Kong | 63 |
| Germany | 14 |
| Singapore | 10 |
| United Kingdom | 10 |
| Thailand | 8 |
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 | 70 |
| Hello from Palo Alto Networks, find out more about our scans in https://docs-cortex.paloaltonetworks.com/r/1/Cortex-Xpanse/Scanning-activity | 27 |
| 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 | 16 |
| Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 | 16 |
| Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0 | 8 |
Port report
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