Port 25 (SMTP)

HoneyLabs honeypots recorded 398 probes against destination port 25 (SMTP) from 185 distinct source IP addresses in the last 7 days.

First observed 2026-09-23 16:16:56, most recently 2026-09-30 13:31:17 (UTC).

Most active source addresses

Source IPProbesNetworkCountry
18.218.118.20318Amazon.com, Inc.US
134.168.246.5716UCLOUD INFORMATION TECHNOLOGY (HK) LIMITEDHK
18.116.101.22016Amazon.com, Inc.US
89.248.172.3310IP Volume incNL
45.91.64.69JSC F6RU
152.32.150.58UCLOUD INFORMATION TECHNOLOGY (HK) LIMITEDUS
93.174.93.128IP Volume incNL
203.123.81.1098HUAWEI CLOUDSZA

Networks it comes from

ASNOrganisationProbesSource IPs
AS135377UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED8213
AS396982Google LLC5330
AS16509Amazon.com, Inc.525
AS8075Microsoft Corporation4342
AS6939Hurricane Electric LLC3024
AS202425IP Volume inc254

Where it comes from

CountryProbes
United States192
Belgium49
Hong Kong33
The Netherlands26
China14
Russia14

Client strings seen on this port

User agentProbes
visionheight.com/scan Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) Chrome/126.0.0.0 Safari/537.3638
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/120.0.0.016
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.3615
fasthttp15
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.3612

Port report

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