What technology does coremail.cn use?

coremail.cn is built with jQuery, Nginx.

Is coremail.cn secure (HTTPS)?

Yes. coremail.cn uses TLS 1.2 with a certificate issued by GoDaddy.com, Inc., valid until Oct 16, 2026.

Who hosts coremail.cn?

Hosting provider information for coremail.cn is not available yet.

What is coremail.cn's SEO score?

coremail.cn scored 60/100 for SEO in the latest analysis (fair).

What is coremail.cn's overall website score?

coremail.cn has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.

Has coremail.cn's score changed over time?

coremail.cn's overall score has improved by 5 points (from 70 to 75) since Jul 26, 2026.

coremail.cn

Coremail邮件系统_企业邮箱_邮件网关_10亿用户信赖的邮件服务器系统

Last scanned Aug 3, 2026, 2:00 AM · 5 views

Overall score

Fair

Summary

Coremail是国内头部电子邮件产品与解决方案提供商，全面国产化适配，产品涵盖信创邮件系统、信创云企业邮箱、邮件安全网关等，可为各行业提供更加安全、高效、��… This website uses Nginx. SEO is fair (60/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Title longer than 60 characters.

Coremail是国内头部电子邮件产品与解决方案提供商，全面国产化适配，产品涵盖信创邮件系统、信创云企业邮箱、邮件安全网关等，可为各行业提供更加安全、高效、自主可控的信创邮件系统解决方案，电话400-000-1631

Top issues to fix

13 issues found · 2 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Title longer than 60 characters
SEO
Shorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.

+7 more issues — details in the sections below.

SEO

7 issue(s) found

Performance

839 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

+5 overall since Jul 26, 2026

Overall: 75
SEO: 60
Security: 65
Performance: 90
Accessibility: 90

Organization

Company details published in this site's own structured data.

Contact

Email, phone, and address published on this site's own pages.

Email: sales@coremail.cn support@coremail.cn

Meta tags

Title: Coremail邮件系统_企业邮箱_邮件网关_10亿用户信赖的邮件服务器系统
Description: Coremail是国内头部电子邮件产品与解决方案提供商，全面国产化适配，产品涵盖信创邮件系统、信创云企业邮箱、邮件安全网关等，可为各行业提供更加安全、高效、自主可控的信创邮件系统解决方案，电话400-000-1631
Canonical
Language
Charset: UTF-8
Viewport: width=device-width, initial-scale=1, user-scalable=no, minimal-ui
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

jQuery Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.2
Issuer: GoDaddy.com, Inc.
Subject: *.coremail.cn
Valid from: Apr 1, 2026
Valid to: Oct 16, 2026
Days until expiry: 74
SAN domains: *.coremail.cn, coremail.cn

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 0 · H3 0

Links

37 internal · 7 external · 20 broken

Images

118 total · 0 missing alt

Scripts / Styles

20 scripts · 4 stylesheets

JS / CSS size

7.6 KB · 0 B

Page size

106 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Title longer than 60 characters
Meta description longer than 160 characters
Missing canonical link
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://coremail.cn
Final URL: https://www.coremail.cn/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 837 ms
HTML size: 106 KB
Redirect chain: https://coremail.cn → https://www.coremail.cn/

See something wrong on this report? Request a correction

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