Accessibility
· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.FForm AccessibilityAction6 of 8 controls have issuesFIX
| Control | Type | Label | Method |
|---|---|---|---|
| #gdpr_consent-9b4d77cf-0b8b-4201-9263-9bf8f06d410b | checkbox | none | |
| #trustarc-lang-select | select | Select language | for/id |
| #email-9b4d77cf-0b8b-4201-9263-9bf8f06d410b | (Business Email*) | placeholder only | |
| s | text | (Search...) | placeholder only |
| s | text | (Search...) | placeholder only |
| input | submit | (none) | none |
| input | submit | (none) | none |
| input | submit | (none) | none |
Form controls need a <label>, aria-label, or aria-labelledby for screen readers.
<input type="submit">; <input type="submit">; <input type="submit">
Form controls without labels — assistive tech announces 'edit text' with no context; users can't complete forms.
Source: WCAG 2.1 SC 3.3.2
Placeholder text disappears on focus and is not a reliable label.
<input type="text" name="s">; <input type="text" name="s">; <input type="email" name="email" id="email-9b4d77cf-0b8b-4201-9263-9bf8f06d410b">
Placeholder-only labels disappear when the user starts typing — they must remember what the field was for.
Learn more ▾ ▴
Placeholders are NOT labels. They vanish on input, fail color contrast checks (most are gray), and don't satisfy WCAG SC 3.3.2. Always use a real <label> alongside (or aria-labelledby).
Source: WCAG 2.1 SC 3.3.2 / Nielsen Norman
DLink & Button QualityAction4 issue(s) across 198 links and 8 buttonsFIX
| Element | Text | Issue | Suggested Fix |
|---|---|---|---|
| https://synacor.com/about-us | About Us | new tab | Add '(opens in new tab)' to text |
| https://support.zimbra.com/s/login/?ec=3… | Support Portal | new tab | Add '(opens in new tab)' to text |
| https://synacor.com/about-us | About Us | new tab | Add '(opens in new tab)' to text |
| https://support.zimbra.com/s/login/?ec=3… | Support Portal | new tab | Add '(opens in new tab)' to text |
| /product/enterprise-collaboration/ | here | generic text | Replace with descriptive text |
Before: here Suggested: Enterprise Collaboration | |||
| https://zimbra.github.io/documentation/z… | Admin Guide: Client Compatibil… | new tab | Add '(opens in new tab)' to text |
| https://www.zimbra.com/product/enterpris… | here | generic text | Replace with descriptive text |
Before: here Suggested: #Edition Comparison | |||
| https://www.zimbra.com/connect/forms/?fo… | Web Client | new tab | Add '(opens in new tab)' to text |
| https://www.zimbra.com/connect/forms/?fo… | Zimbra Desktop | new tab | Add '(opens in new tab)' to text |
| https://www.zimbra.com/wp-content/upload… | Zimbra Chat Datasheet | new tab | Add '(opens in new tab)' to text |
| https://www.zimbra.com/connect/support/s… | Renewing support | new tab | Add '(opens in new tab)' to text |
| https://support.zimbra.com/s/login/?ec=3… | Support Portal | new tab | Add '(opens in new tab)' to text |
| https://blog.zimbra.com/2026/03/product-… | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://blog.zimbra.com/2026/03/product-… | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://blog.zimbra.com/2025/03/new-patc… | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://blog.zimbra.com/2025/03/new-patc… | open in new tab | new tab | Add '(opens in new tab)' to text |
| (empty) | empty | Add link text or aria-label | |
| https://www.facebook.com/Zimbra | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://twitter.com/zimbra | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://www.youtube.com/c/zimbra | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://www.linkedin.com/companies/zimbr… | open in new tab | new tab | Add '(opens in new tab)' to text |
| https://github.com/Zimbra | open in new tab | new tab | Add '(opens in new tab)' to text |
| //privacy.truste.com/privacy-seal/valida… | TRUSTe | new tab | Add '(opens in new tab)' to text |
| https://synacor.com/privacy-policy | Privacy Policy | new tab | Add '(opens in new tab)' to text |
| https://synacor.com/do-not-sell | Do Not Sell | new tab | Add '(opens in new tab)' to text |
| https://synacor.com/personal-data?__hstc… | CCPA Disclosures | new tab | Add '(opens in new tab)' to text |
| https://synacor.com/privacy-policy/defau… | Privacy Policy | new tab | Add '(opens in new tab)' to text |
| #teconsent | here | generic text | Replace with descriptive text |
Before: here Suggested: #Teconsent | |||
| https://synacor.com/privacy-policy/defau… | Privacy Policy | new tab | Add '(opens in new tab)' to text |
| https://trustarc.com | trustarc | new tab | Add '(opens in new tab)' to text |
Links without text are announced as raw URLs by screen readers.
a#newsletter_subscription
Links with no accessible text (empty <a></a>, image-only no alt, icon-only no aria-label) are unidentifiable to screen readers.
Source: WCAG 2.1 SC 2.4.4
Generic link text like 'click here' doesn't describe the destination.
/product/enterprise-collaboration/ ("here"); https://www.zimbra.com/product/enterprise-collaboration/#edition-comparison ("here"); #teconsent ("here")
Generic anchor text ('click here', 'read more', 'learn more') tells screen readers and search engines nothing about the destination.
Learn more ▾ ▴
Out-of-context lists of links read by AT (one navigation pattern) become useless when every link says 'click here'. Use the destination's title or topic as anchor text. Doubles as SEO win — Google passes anchor-text relevance to the destination.
Source: WCAG 2.4.4 / Google Search Central
Image-only links need alt text on the image (or aria-label on the link) so screen readers can announce them.
a[href="https://blog.zimbra.com/2026/03/product-advisory-zmpurgeoldmbox-may-delete-ex…"]
Image-only links with no alt are unidentifiable to screen-reader users — link's destination is invisible.
Source: WCAG 2.1 SC 2.4.4
Add '(opens in new tab)' to link text or aria-label.
https://synacor.com/about-us; https://support.zimbra.com/s/login/?ec=302&startURL=%2Fs%2F; https://synacor.com/about-us; https://support.zimbra.com/s/login/?ec=302&startURL=%2Fs%2F; https://zimbra.github.io/documentation/zimbra-10/adminguide.html#_client_comp…; https://www.zimbra.com/connect/forms/?form=web-client; https://www.zimbra.com/connect/forms/?form=trial-license; https://www.zimbra.com/wp-content/uploads/2025/05/Zimbra-Chat-Basic-vs-Advanc…; https://www.zimbra.com/connect/support/support-offerings/; https://support.zimbra.com/s/login/?ec=302&startURL=%2Fs%2F (+15 more)
Links with target="_blank" without rel="noopener" leak the originating page's window context — security and UX issue.
Learn more ▾ ▴
Without rel="noopener", the new tab can navigate the original tab via window.opener (tab-nabbing attack). Modern browsers default to noopener for target=_blank but only since recent versions. Always set rel="noopener noreferrer" explicitly.
Source: MDN target / OWASP
DWeb ManifestActionNot foundFIX
No web manifest found.
DDark Mode SupportActionNo dark mode signalsFIX
Detection limited to meta tags and inline styles.
DPrint StylesheetActionNo print stylesFIX
BLandmark Structure5 landmarksREVIEW
Multiple navigations need aria-label to distinguish them for screen readers.
Some <nav> elements lack aria-label — screen-reader users hear 'navigation' multiple times with no way to distinguish them.
Learn more ▾ ▴
When a page has multiple <nav> regions (primary, footer, breadcrumb), each needs aria-label or aria-labelledby. AT users navigate by landmark; identical 'navigation' announcements force them to enter each one to discover purpose.
Source: WAI-ARIA Authoring Practices
Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.
Without a skip-nav link, keyboard users tab through every nav item before reaching content — every page, every visit.
Learn more ▾ ▴
WCAG 2.4.1 (Bypass Blocks) requires a mechanism to skip past repeated content. The standard implementation is a 'Skip to main content' link that's the first focusable element, visually hidden until focused. Three lines of HTML + four of CSS.
Source: WCAG 2.1 SC 2.4.1
CAlt Text QualityAction14 of 162 images have issuesREVIEW
| Issue | Count |
|---|---|
| missing | 14 image(s) |
Images without alt text are invisible to screen readers.
Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.
Learn more ▾ ▴
WCAG 2.1 Level A requires text alternatives for non-decorative images. Empty alt='' is fine for decorative; meaningful images need descriptive text. Common fixes: CMS audit + bulk add, build-time linter (alt-text-required ESLint rule), CI gate on Lighthouse a11y score.
Source: WCAG 2.1 SC 1.1.1 / WebAIM Million Report
C404 Error PageActionHTTP 404, custom pageREVIEW
BFavicon & Branding4 icon(s) detectedREVIEW
CColor Contrast (Screenshot)Action20 text elements analyzed, 17 fail WCAG AAREVIEW
Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.
9 contrast failures on background images/gradients
These failures are invisible to CSS-based accessibility tools like Lighthouse. The text may be fine on a solid background, but fails when rendered over an image or gradient.
Show all checked elements (20)
| Element | Ratio | Required | FG | BG | Result |
|---|---|---|---|---|---|
| h1 Deploy Email and Col… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h1 Your Way. Your Data.… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h1 Blogs | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Stay Safe with Secur… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Why Zimbra? | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Email and Collaborat… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Trusted by thousands… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Get Started with the… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Support Levels | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 FAQs | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 What’s New in Zimb… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Subscribe | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h2 Ready To Make The Sw… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h3 Mailboxes Deployed W… | 4.65:1 | 3.0:1 | #F6A04B | #404450 | Pass |
| h3 Years of Proven Stab… | 4.43:1 | 3.0:1 | #57C389 | #404450 | Pass |
| h3 Partners for Localiz… | 4.77:1 | 3.0:1 | #4FC7C6 | #404450 | Pass |
| h3 Trusted Alternative … | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h3 Your Data, Your Choi… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h3 Open Source Transpar… | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
| h3 Scalability Without … | 2.16:1 | 3.0:1 | #000000 | #404450 | Fail |
Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.
CLighthouse Accessibility AuditsActionScore 77/100 — 8 failing, 26 passedREVIEW
Accessibility
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
ARIA
Some ARIA child roles must be contained by specific parent roles to properly perform their intended accessibility functions. Learn more about ARIA roles and required parent element.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
End Users div > div.tabsbutton > ul.resp-tabs-list > li.resp-tab-item |
Back-End Features div > div.tabsbutton > ul.resp-tabs-list > li.resp-tab-item |
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
End Users div > div.tabsbutton > ul.resp-tabs-list > li.resp-tab-item |
Back-End Features div > div.tabsbutton > ul.resp-tabs-list > li.resp-tab-item |
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid names. Learn more about valid ARIA attributes.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Email: Where Collaboration Starts
Intuitive email interface for seamless inbox… div.verticaltabs > div > div.resp-tabs-container > div.tabcontentcontainer |
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Contrast
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Back-End Features div.tabsbutton > ul.resp-tabs-list > li.resp-tab-item > h3 |
These are opportunities to improve the legibility of your content.
Names and labels
Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.tabcontent > div.tabimagewrap > div.pattern > img div.tabcontent > div.tabimagewrap > div.pattern > img |
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Tables and lists
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
End Users
Back-End Features div.verticaltabs > div > div.tabsbutton > ul.resp-tabs-list |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Screen readers have features to make navigating tables easier. Ensuring that tables use the actual caption element instead of cells with the `[colspan]` attribute may improve the experience for screen reader users. Learn more about captions.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
SUPPORT TYPES
Premier Standard
In addition to Standard Business Hours support… div.supportOfferings > div.column > div.tablewrap > table.support |
PREMIER ADD ONS
Elite
Prioritized organizational relationship with Zimbra, in… div.supportOfferings > div.column > div.tablewrap > table.support |
Screen readers have features to make navigating tables easier. Ensuring that `<td>` elements in a large table (3 or more cells in width and height) have an associated table header may improve the experience for screen reader users. Learn more about table headers.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
FEATURES
Standard
Professional
Email, Contacts & Calendar
Sharing & Dele… div.parallaxcontent > div.blockcontent > div.tablewrap > table.get_started |
AHeading Hierarchy48 headingsPASS
- H1 Deploy Email and Collaboration
- H1 Your Way. Your Data. Your Rules. duplicate H1
- H2 Stay Safe with Secure Email
- H3 Mailboxes Deployed Worldwide
- H3 Years of Proven Stability
- H3 Partners for Localized Support
- H2 Why Zimbra?
- H3 Trusted Alternative to Technology Giants
- H3 Your Data, Your Choice
- H3 Open Source Transparency
- H3 Scalability Without Compromise
- H3 Open Standards = Zero Lock-In
- H2 Email and Collaboration. Hosted Your Way.
- H3 End Users
- H3 Back-End Features
- H3 End Users
- H4 Email: Where Collaboration Starts
- H4 Chat: Connect Instantly, Securely
- H4 Calendar: Stay organized, in sync — and on the move
- H4 Briefcase: File Management Simplified
- H4 Office: Create, Edit, and Collaborate
- H4 Anywhere, Anytime Access: Web • Mobile (ActiveSync) • Desktop (Offline)
- H3 Back-End Features
- H4 Admin Capabilities
- H2 Trusted by thousands of clients
- H2 Get Started with the Right Email Solution
- H3 Features
- H4 Expanded Features
- H2 Support Levels
- H3 Support Types
- H3 Premier Add Ons
- H2 FAQs
- H3 What is Zimbra?
- H3 Which platforms and devices are compatible with Zimbra?
- H3 Do I need a commercial license?
- H3 How does Zimbra ensure secure email communication?
- H3 Is Zimbra GDPR and HIPAA compliant?
- H3 How does Zimbra handle Backup & Restore?
- H3 How do I get started on Zimbra?
- H3 Is Zimbra mobile-friendly?
- H3 Does Zimbra have integrated messaging?
- H3 How scalable is Zimbra?
- H3 How can I renew support?
- H3 How do I get support?
- H1 Blogs duplicate H1
- H2 What’s New in Zimbra?
- H2 Subscribe
- H2 Ready To Make The Switch?
A page should have only one H1. Multiple H1s dilute the document outline.
Multiple H1s blur the page's primary topic — screen-reader users and Google both prefer one H1.
Learn more ▾ ▴
HTML5's outline algorithm technically allows multiple H1s within sectioning content, but no browser implements it. In practice: one H1 per page. Use H2-H6 for subsections.
Source: WCAG 2.4.6 / Google Search Central