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mailu.io

https://mailu.io· First analyzed 14 May 2026· Updated 14 May 2026
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mailu.io
Desktop screenshot of mailu.io
Mobile screenshot of mailu.io
Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

78.47.92.244

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Organization

Hetzner Online GmbH

Server

Nginx

Nameservers

dns1.tedomum.net.dns2.tedomum.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
496 ms10%
Speed Index
645 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
843 KB
18 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Hetzner

Technology Stack

4 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Web Servers

1
Nginxv1.29.0

SEO Analysis

C64/100
16
8
1
Meta Tags7/15
Content11/12
Headings8/8
Technical14/21
E-E-A-T3/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
M
mailu.iomailu.io

Mailu — Mailu, Docker based mail server

No description available for this page.

Title Length39 chars

Recommended: 50-60 chars (~234px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

9 issues found

Upgrade to view details

Local SEO

Local Search Readiness

3/100
Poor
1 14 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

D47/100
Bot Access
20/25
Machine Read.
19/25
Schema Data
1/25
Citation
7/25

AI Bot Access

14/14 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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
def. listsnav
Text ratio:18%
Words:700
Token eff.:Optimal
Depth:2/5

Structured Data

Microdata
Article×1.2(min)microdata

Citation Readiness

Opening Summary63w
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
A
84/100
13
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
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
7/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
58/100
B
85 mg
CO₂e / view
842.7 KB
Page Weight
80%
Cleaner Than
New Visitor
97 mg
vs
Returning (cached)
49 mg
Annual (10K/mo)
10.2 kg
Emission Segments
Data Center
4 mg
Network
25 mg
Device
56 mg
Resource Breakdown
JavaScript
107.9 KB
Images
67.7 KB
CSS
638.8 KB
HTML
28.2 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

55d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

10.04.2026

Valid Until

09.07.2026

Subject Alternative Names (3)

mailu.iosetup.mailu.iotest.mailu.io

SHA-256 Fingerprint

D4:47:45:5D:37:5C:70:CC:F0:44:4C:E0:CA:0D:F8:25:5F:61:EB:D4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
content-length
28590
content-type
text/html
date
Thu, 14 May 2026 09:17:45 GMT
etag
"69fef020-6fae"
last-modified
Sat, 09 May 2026 08:28:16 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

50

SPF
DKIM
DMARC

MX Records (1)

mail.tedomum.net

Domain Information

mailu.io

Domain Age
9y 6m

Created

19.10.2016

Expires

19.10.2026

Last Updated

23.09.2025

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.
D
57/100
Mobile Friendly1 breakpoint
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.
Viewport
width=device-width, initial-scale=1
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto Slab + Lato

WCAG Partial
67/100
Readability
/30
20/30

16px · LH 1.50

Hierarchy
/20
17/20

1.75x ratio · ✓ H1→H6

WCAG
/25
19/25

4.19:1 min contrast

Performance
/25
11/25

2 fonts · 4 req

Heading Font

Roboto Slab

Sans28px

Body Font

Lato

Sans16px

Contrast Ratio

4.19:1

1 issue

Reading Comfort

~35 CPL

Narrow lines
28px
h1
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 13/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 4.2:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 13

Color Palette

5 unique colors
12.48:1 AAA Light
#fcfcfc
Background· 55.3%
#333230
Other· 18%
#486375
Primary· 6.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

8 Resources

6
Scripts
2
Styles
0
Async
0
Defer

Top Script Sources

_static(6)

Website Identity

mailu.io

9 years old
Location detected: 🇩🇪 Germanyvia ip
Gandi SASen

Social Profiles

GitHub

Sponsored

Last analyzed: 14 May 2026 at 09:17

Historical Analysis & Change Tracking