Network Port
SMTP-Submission
Port 587
Well-known service: SMTP-Submission
Total Hosts
1,708,028
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 | 5,065 |
| Tengine | 5,005 |
| CloudWAF | 533 |
| nginx | 125 |
| ESA | 74 |
| Apache | 72 |
| Microsoft-IIS/10.0 | 56 |
| openresty | 56 |
| Microsoft-HTTPAPI/2.0 | 55 |
| nginx/1.18.0 (Ubuntu) | 45 |
| EIG Embedded Web Server | 29 |
| system-admin-agent/1.0.0 | 28 |
Top Countries
Top ASNs
| ASN | Name | IPs |
|---|---|---|
| AS396982 | Google Cloud | 69,505 |
| AS37963 | Alibaba (China) | 25,111 |
| AS12824 | home.pl S.A. | 17,375 |
| AS19551 | Thales/Imperva | 16,798 |
| AS16276 | OVHcloud | 16,462 |
| AS24940 | Hetzner Online | 13,059 |
| AS26496 | GoDaddy | 12,345 |
| AS46606 | Endurance International Group, Inc | 12,188 |
| AS4230 | Claro | 8,008 |
| AS2514 | NTT PC Communications (InfoSphere) | 7,782 |
| AS1659 | Taiwan Academic Network(TANet) | 6,437 |
| AS13335 | Cloudflare | 6,329 |
Wappalyzer Tech-Stack on Port 587
| Technology | Hosts |
|---|---|
| jQuery | 60 |
| jQuery Migrate | 18 |
| jQuery UI | 15 |
| Bootstrap | 14 |
| RequireJS | 12 |
| Underscore.js | 11 |
| Bootbox.js | 9 |
| Select2 | 9 |
| Synology DiskStation | 8 |
| AngularJS | 7 |
| Vue.js | 6 |
| jQuery BlockUI | 5 |
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.