Network Port
SMTP-Submission
Port 587
Well-known service: SMTP-Submission
Total Hosts
1,445,730
last 90 d
Countries
12
distinct
Top Software
CW
from banners
CVE Hits
—
NVD feed pending
Service Detail
Port
587
Protocol
TCP / UDP
Service
SMTP-Submission
IANA Reserved
—
Common Risk
—
Top Software on this Port
| Server / Banner | Hits |
|---|---|
| CW | 4,296 |
| Tengine | 4,170 |
| CloudWAF | 457 |
| nginx | 100 |
| Apache | 55 |
| Microsoft-HTTPAPI/2.0 | 50 |
| Microsoft-IIS/10.0 | 46 |
| openresty | 37 |
| nginx/1.18.0 (Ubuntu) | 35 |
| ESA | 34 |
| uvicorn | 25 |
| EIG Embedded Web Server | 22 |
Top Countries
Top ASNs
| ASN | Name | IPs |
|---|---|---|
| AS396982 | Google Cloud | 40,449 |
| AS37963 | Alibaba (China) | 12,098 |
| AS12824 | home.pl S.A. | 9,997 |
| AS16276 | OVHcloud | 9,460 |
| AS19551 | Thales/Imperva | 9,089 |
| AS24940 | Hetzner Online | 7,697 |
| AS26496 | GoDaddy | 7,107 |
| AS46606 | Endurance International Group, Inc | 6,886 |
| AS4230 | Claro | 4,726 |
| AS197207 | Mobile Communication Company of Iran | 4,710 |
| AS2514 | NTT PC Communications (InfoSphere) | 4,626 |
| AS13335 | Cloudflare | 3,961 |
Wappalyzer Tech-Stack on Port 587
| Technology | Hosts |
|---|---|
| jQuery | 36 |
| jQuery Migrate | 9 |
| jQuery UI | 9 |
| Bootstrap | 7 |
| jQuery BlockUI | 5 |
| RequireJS | 4 |
| Bootbox.js | 4 |
| Underscore.js | 4 |
| Select2 | 4 |
| AngularJS | 3 |
| Synology DiskStation | 3 |
| jQuery CDN | 2 |
Recently Seen on Port 587
Hosts most recently observed with this port open in our scan sweep.
CVE Matches
No version-matched CVEs
No published CVE exactly matches a software version seen on this port. Banners often omit versions, which limits precise matching.