Sender Audit for Gmail by Sender Audit

Sender Audit for Gmail adds an "Analyse" button directly inside Gmail. One click sends the selected email to senderaudit.com for a comprehensive deliverability and security audit.

What gets checked:
- Authentication - SPF, DKIM, DMARC alignment and policy
- IP reputation - blacklist checks across major RBLs
- Spam score - SpamAssassin + Rspamd analysis
- Content - HTML/text ratio, mixed content, suspicious patterns
- Readability - subject length, body structure, link density
- Headers - full trace, routing, and TLS inspection
- Visual preview - how the email renders in common clients

Results open in a detailed report with a global score and per-section breakdown.

No configuration required. Sign in to your Sender Audit account from the extension popup and start analysing immediately. Your scan history is saved in the popup for quick access.

Works on Gmail (mail.google.com). Requires a free Sender Audit account.