Test if your domain's emails will reach the inbox. We check DMARC, SPF, DKIM, MX records, blacklist status, and forwarding readiness — then tell you exactly what to fix.
Tested by ARC-Relay
ARC-Relay adds cryptographic ARC seals and SRS rewriting so your forwarded emails always pass authentication and reach the inbox.
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Email deliverability depends on authentication (SPF, DKIM, DMARC), sender reputation, email content, and infrastructure configuration. Without these foundations in place, your emails are far more likely to land in spam or be rejected entirely.
Authentication tells receiving servers that your emails are legitimate. Without proper SPF, DKIM, and DMARC records, emails are far more likely to land in spam. SPF declares which servers can send on your behalf, DKIM adds a cryptographic signature to prove the message wasn't tampered with, and DMARC ties them together with a policy that tells receivers what to do when authentication fails.
IP reputation matters — if your sending IP is on blacklists, emails will be blocked regardless of authentication. Blacklists like Spamhaus, SpamCop, and Barracuda track IPs known for sending spam. Getting listed can happen from compromised accounts, misconfigured servers, or even shared hosting with bad neighbors.
Email forwarding breaks authentication. When you forward an email, SPF fails because the forwarding server's IP isn't authorized by the original sender's SPF record. If the forwarding process modifies headers or content, DKIM signatures break too. With both SPF and DKIM failing, DMARC fails entirely.
ARC-Relay fixes this with ARC (Authenticated Received Chain) sealing and SRS (Sender Rewriting Scheme) rewriting. ARC preserves the original authentication results through the forwarding chain, while SRS rewrites the envelope sender so SPF checks pass at the destination.
Common reasons: missing or weak DMARC/SPF/DKIM records, sending IP on blacklists, new domain without reputation, high bounce rates, or spam-like content. Start by checking your authentication records with this tool. Strong authentication (DMARC with p=reject, SPF with -all, and DKIM signing) is the foundation of inbox delivery.
This tool automatically checks your domain's IP against major DNS blacklists including Spamhaus, SpamCop, and Barracuda. If your IP is listed, contact the blacklist operator for removal instructions. Most blacklists require you to fix the underlying issue (compromised account, misconfigured server) before they will delist you.
A score of 90+ (excellent) means your domain has strong authentication, clean reputation, and proper infrastructure. 75-89 (good) indicates minor improvements are possible. Below 55 (poor/critical) means significant issues need immediate attention. Focus on adding missing authentication records first — they have the biggest impact.
Yes, but authentication comes first. Without proper SPF, DKIM, and DMARC, even well-crafted emails may land in spam. This tool focuses on the DNS authentication layer. Content factors (subject lines, HTML quality, link reputation) matter once authentication is solid.
Forwarding breaks SPF because the forwarding server's IP isn't in the original sender's SPF record. If DKIM signatures are also modified, DMARC fails entirely. ARC (Authenticated Received Chain) solves this by preserving the original authentication results through the forwarding chain. ARC-Relay adds ARC seals automatically.