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postfilter.nl

https://postfilter.nl· First analyzed 03 Jun 2026· Updated 03 Jun 2026
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postfilter.nl
Desktop screenshot of postfilter.nl
Mobile screenshot of postfilter.nl
Mobile

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Hosting Provider

Directvps

IP Address

178.21.117.170

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS29028

Organization

Directvps

Server

Nginx

Nameservers

ns02.hostnet.nl.ns01.hostnet.nl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
569 ms10%
Speed Index
740 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.8 MB
39 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Directvps

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

8 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

Security

1
reCAPTCHA

Customer Support

1
Zendesk

SEO Analysis

C68/100
20
5
0
Meta Tags9/15
Content11/12
Headings6/8
Technical16/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
P
postfilter.nlpostfilter.nl

Postfilter.nl

Ontvangt u ongevraagde reclamepost met uw adres en/of naam erop? Via Postfilter kunt u afzenders laten weten wat u wel en niet in uw brievenbus wilt.

Title Length13 chars

Recommended: 50-60 chars (~71px / 580px)

Description Length149 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    2 rules

    Allows all crawlers

    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.

    Sponsored

    AI & LLM Readiness

    D49/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    0/25
    Citation
    15/25

    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.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    navheader/footer
    Text ratio:14%
    Words:1,580
    Token eff.:Optimal
    Sections/1K:12
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary26w
    Descriptive Headingsavg 4.5w
    Canonical URL
    Open Graph3/3
    Twitter Card2/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (7)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    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
    83/100
    13
    Passed
    2
    Critical
    1
    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
    13/15
    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
    8/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
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    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.
    30/100
    D
    223 mg
    CO₂e / view
    1.8 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    255 mg
    vs
    Returning (cached)
    128 mg
    Annual (10K/mo)
    26.8 kg
    Emission Segments
    Data Center
    50 mg
    Network
    54 mg
    Device
    120 mg
    Resource Breakdown
    JavaScript
    116.9 KB
    Images
    1.5 MB
    CSS
    126.7 KB
    Fonts
    1.2 KB
    HTML
    11.3 KB
    Green Hosting Not Verified
    Directvps
    6 recommendations
    • •Carbon footprint recommendation preview...
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    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    47d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp384r1) (384 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    21.04.2026

    Valid Until

    20.07.2026

    Subject Alternative Names (2)

    postfilter.nlwww.postfilter.nl

    SHA-256 Fingerprint

    72:6B:86:22:FB:35:AA:48:09:07:75:C9:14:A3:4E:B8:F8:FB:71:BD...

    Top Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache, private)
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=utf-8
    date
    Wed, 03 Jun 2026 00:46:55 GMT
    server
    nginx
    vary
    Accept-Encoding
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    100

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (1)

    postfilter-nl.mail.protection.outlook.com

    Domain Information

    postfilter.nl

    Domain Age
    17y 4m

    Created

    27.01.2009

    Last Updated

    14.04.2022

    Registrar

    Hostnet B.V.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    Privacy policy page linked

    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.
    B
    76/100
    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, shrink-to-fit=no
    1 recommendation
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    ssp_bolditalic + Source Sans Pro

    WCAG Partial
    68/100
    Readability
    /30
    20/30

    16px · LH 1.38

    Hierarchy
    /20
    18/20

    4.5x ratio · ✓ H1→H6

    WCAG
    /25
    15/25

    1:1 min contrast

    Performance
    /25
    15/25

    System fonts

    Heading Font

    ssp_bolditalic

    Sans72px

    Body Font

    Source Sans Pro

    Sans16px

    Contrast Ratio

    1:1

    26 issues

    Reading Comfort

    ~37 CPL

    Narrow lines
    72px
    h1
    42px
    h2
    19px
    h3
    16px
    h4
    16px
    p

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

    ⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

    ⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 26 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 4.5x larger than body text.

    GGoogle FontsBuy on MyFontsFlesch 34

    Color Palette

    8 unique colors
    5.74:1 AA Dark
    #666666
    Other· 63.800000000000004%
    #ffffff
    Primary· 15.2%
    #4e2e36
    Primary· 5.7%
    #455a61
    Secondary· 5.4%
    #0f4156
    Accent· 3.5%
    #547888
    Secondary· 2.2%
    #cbdee5
    Secondary· 2%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    12 Resources

    9
    Scripts
    3
    Styles
    3
    Async
    0
    Defer

    Top Script Sources

    postfilter.nl(5)gstatic.com(1)googletagmanager.com(1)acsbapp.com(1)google.com(1)

    Website Identity

    postfilter.nl

    17 years old
    Location detected: 🇳🇱 Netherlandsvia tld
    Hostnet B.V.📧 Microsoft 365nl

    Sponsored

    Last analyzed: 03 Jun 2026 at 00:47

    Historical Analysis & Change Tracking