Port 25 (SMTP)
HoneyLabs honeypots recorded 250 probes against destination port 25 (SMTP) from 143 distinct source IP addresses in the last 7 days.
First observed 2026-11-09 00:03, most recently 2026-11-15 21:08 (UTC).
What the sensors show
The sources sat in 25 networks across 14 countries. No single address sent more than 6% of them. The largest source network was AS15169 (Google LLC), with 33% of the probes from 46 addresses. 6 of the 25 busiest addresses are recognised research scanners.
Most active source addresses
| Source IP | Probes | Network | Country |
|---|---|---|---|
| 152.32.178.47 | 16 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | RU |
| 118.194.248.142 | 8 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | KR |
| 165.154.10.165 | 8 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | NG |
| 3.129.187.38 | 6 | Amazon.com, Inc. | US |
| 71.6.232.23 | 6 | CariNet, Inc. | US |
| 170.231.236.98 | 4 | GRUPO PANAGLOBAL 15 S.A | PA |
| 35.210.8.195 | 4 | Google LLC | BE |
| 18.218.118.203 | 4 | Amazon.com, Inc. | US |
Networks it comes from
| ASN | Organisation | Probes | Source IPs |
|---|---|---|---|
| AS15169 | Google LLC | 82 | 46 |
| AS135377 | UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | 32 | 3 |
| AS8075 | Microsoft Corporation | 20 | 20 |
| AS16509 | Amazon.com, Inc. | 18 | 4 |
| AS6939 | Hurricane Electric LLC | 12 | 10 |
| AS213412 | ONYPHE SAS | 12 | 11 |
Where it comes from
| Country | Probes |
|---|---|
| United States | 87 |
| Belgium | 73 |
| Russia | 20 |
| China | 16 |
| The Netherlands | 10 |
| United Arab Emirates | 9 |
Client strings seen on this port
| User agent | Probes |
|---|---|
| Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 | 24 |
| Mozilla/5.0 (compatible; FlowIQLabsBot/1.0; +https://flowiq-labs.com/scanning-info) | 8 |
| 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 | 8 |
| Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36 | 4 |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 | 3 |
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