Is your email landing in spam?

Check SPF, DKIM, DMARC, MTA-STS and BIMI for any domain in seconds and get the exact DNS records to fix it.

Why this matters

Since 2024 Gmail and Yahoo, and since 2025 Microsoft Outlook, reject or junk mail from domains without SPF, DKIM and DMARC. If your invoices, newsletters or cold emails go to spam, authentication is the first thing to fix.

What the checker looks at

• SPF – which servers may send for you, including the 10-DNS-lookup limit that silently breaks many records.
• DKIM – signing keys on 40+ common selectors (Google, Microsoft, Zoho, SendGrid, Mailchimp…) and key strength.
• DMARC – your policy, reporting address and enforcement.
• MTA-STS, TLS-RPT, BIMI – transport security and your logo in the inbox.

Step-by-step setup guides

Google Workspace · Microsoft 365 · Zoho Mail · Proton Mail · Cloudflare Email Routing · Mailchimp · SendGrid · Amazon SES

Research

Email security of India's top websites (2026) – SPF and DMARC across 6,500 domains.

Do-it-yourself kits

• Email Deliverability Fix Kit ($15) – 19-page guide, checklist and sender spreadsheet: SPF, DKIM and DMARC for 20+ mail services, plus a bounce-code decoder.
• VPS Security Kit ($19) – lock down an Ubuntu/Debian server in 30 minutes: read-only audit script with a 0–100 score, a hardening script that can't lock you out, and a 13-page guide.