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claws-mail.org

https://claws-mail.org· First analyzed 03 May 2026· Updated 03 May 2026
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claws-mail.org
Desktop screenshot of claws-mail.org
Mobile screenshot of claws-mail.org
Mobile

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Hosting Provider

gandi.net

IP Address

217.70.191.162

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Paris, France

ASN

AS29169

Server

Apache

Nameservers

ns-12-a.gandi.net.ns-129-c.gandi.net.ns-134-b.gandi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
340 ms10%
Speed Index
442 ms10%
Largest Contentful Paint
25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
59 KB
7 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Gandi

Technology Stack

1 Technologies Detected

Web Servers

1

SEO Analysis

D41/100
11
9
4
Meta Tags7/15
Content7/12
Headings1/8
Technical8/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
C
claws-mail.orgclaws-mail.org

Claws Mail - The user-friendly, lightweight, and fast e-mail client

No description available for this page.

Title Length67 chars

Recommended: 50-60 chars (~395px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

  • Missing meta description — important for click-through rates in SERPs
  • Missing H1 tag — every page should have exactly one H1
  • Most images missing alt text (3/4) — critical for accessibility and SEO

Crawlability

Sitemap
robots.txt

26 rules

Local SEO

Local Search Readiness

0/100
Poor
15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F26/100
Bot Access
15/25
Machine Read.
5/25
Schema Data
0/25
Citation
6/25

AI Bot Access

9/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
def. lists
Text ratio:32%
Words:166
Token eff.:Too Short
Sections/1K:6
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary35w
Descriptive Headingsavg 3w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
D
54/100
6
Passed
7
Critical
0
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
4/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 recommendations
  • Accessibility recommendation preview...

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
72/100
A+
6 mg
CO₂e / view
58.8 KB
Page Weight
95%
Cleaner Than
New Visitor
7 mg
vs
Returning (cached)
3 mg
Annual (10K/mo)
708 g
Emission Segments
Data Center
<0.001 g
Network
2 mg
Device
4 mg
Resource Breakdown
Images
52.9 KB
CSS
4.1 KB
HTML
1.8 KB
Green Hosting Verified
Gandi
Provider Match
3 recommendations
  • Carbon footprint recommendation preview...
B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

42d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

16.03.2026

Valid Until

14.06.2026

Subject Alternative Names (2)

claws-mail.orgwww.claws-mail.org

SHA-256 Fingerprint

8F:06:48:24:28:88:A8:85:2C:9F:17:4F:86:EF:C6:87:BF:D3:FE:89...

Recommendations

Security recommendation preview

HTTP Headers

Developer Console

connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
1531
content-type
text/html; charset=UTF-8
date
Sun, 03 May 2026 04:20:31 GMT
keep-alive
timeout=5, max=100
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

claws-mail.org

Domain Information

claws-mail.org

Domain Age
19y 6m

Created

01.11.2006

Expires

01.11.2029

Last Updated

29.05.2025

Registrar

Gandi SAS

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
F
30/100
Not Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
4 recommendations
  • Mobile compatibility recommendation preview...

Typography & Readability

Bitstream Vera Sans

WCAG AAA
64/100
Readability
/30
18/30

15px · LH --

Hierarchy
/20
8/20
WCAG
/25
24/25

9.4:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Bitstream Vera Sans

Sans

Body Font

Bitstream Vera Sans

Sans15px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned
18px
h3
15px
p

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 44/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Color Palette

7 unique colors
5.66:1 AA Light
#f1f1f1
Background· 79.8%
#5a5f6b
Secondary· 1.8%
#a5c3fe
Primary· 8.2%
#9ab7ec
Accent· 2.3%
#b0b6ca
Secondary· 2.2%

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Scripts & Styles

1 Resources

0
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

claws-mail.org

19 years old
Location detected: 🇫🇷 Francevia ip
Gandi SAS

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Last analyzed: 03 May 2026 at 04:20

Historical Analysis & Change Tracking