MailerStack · Technology · N/a
Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 3 other checks.
MailerStack is a specialized content website focused on providing email marketing insights, strategies, and tool reviews. Founded in 2018, it serves a niche audience of email marketers, small business owners, and digital marketing professionals seeking actionable advice to improve their email campaigns. The site positions itself as an authority in the email marketing space with a consistent brand presence and active social media engagement. Technically, the website is built on WordPress using the Kadence theme and optimized with WP Rocket, delivering good performance and mobile responsiveness. Hosting is provided by WPX Hosting, inferred from the nameservers. Security posture is solid with HTTPS enforced and domain transfer protection enabled, though there is room for improvement by adding security headers and enabling DNSSEC. Privacy compliance is addressed with clear privacy and cookie policies, but lacks an explicit cookie consent mechanism. Contact information is not explicitly provided, which may impact user trust. Overall, the site is professional, content-rich, and trustworthy with minor gaps in security and compliance documentation.
Scanned
NIS2 Art. 21(2)
This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.
GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.
8 findings rated critical or high. Fix these first.
Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.
Forces HTTPS connections
What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"
Prevents clickjacking attacks
What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"
Controls resources the browser is allowed to load
What to do: Implement a Content-Security-Policy appropriate for your application
These are the privacy signals visitors and data protection authorities look for under GDPR.
GDPR requires explicit consent for non-essential cookies
What to do: Implement a cookie consent banner that appears on first visit
SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.
DKIM selector 'dkim' uses 392-bit key
What to do: Use at least 2048-bit RSA keys for DKIM
Need hands-on remediation? Email guard@offseq.com
This scan found 27 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.
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Each check with its score, findings and the evidence it collected.
The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.
Counted in this score
Not counted
Findings that cap the score at 49
Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.
Partial scans
When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.
Risk levels
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention mailerstack.com, from OffSeq Breach.
No leaked records found
Breach holds no records for mailerstack.com right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.
Retrieved 2026-10-25
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