Email Deliverability DNS Checker (SPF, DKIM, DMARC)
Enter a domain to check its SPF, DKIM, DMARC, and MX records, the DNS that decides whether your email lands or bounces to spam.
What the Email Deliverability DNS Checker (SPF, DKIM, DMARC) does.
Broken email authentication is why good campaigns land in spam. Enter your sending domain and Effiqs resolves its MX, SPF, DMARC, and (optionally) DKIM records, then flags the gaps that hurt deliverability, in plain language, not raw DNS.
It's a fast signal check on one domain. Fixing deliverability properly, warm-up, alignment, and monitoring, is part of a demand-gen engagement.
Your sending domain (e.g. company.com), plus an optional DKIM selector.
Your MX, SPF, DMARC, and DKIM records with pass/warn/fail checks and the highest-impact fixes.
Demand-gen and sales teams whose outbound or nurture email needs to reach the inbox.
The methodology.
- We resolve MX (mail servers), the SPF TXT record, the DMARC record at _dmarc.yourdomain, and, if you give a selector, the DKIM key.
- Records are parsed for the common failure modes: no SPF, a soft ~all instead of -all, more than 10 SPF lookups, a missing DMARC or one stuck at p=none, and no MX.
Email Deliverability DNS Checker (SPF, DKIM, DMARC): common questions
What are SPF, DKIM, and DMARC?+
They're the three DNS records that authenticate your email. SPF lists who can send for your domain, DKIM cryptographically signs your messages, and DMARC tells inbox providers what to do when a message fails, and where to send reports. Together they decide whether you reach the inbox.
What's a DKIM selector and where do I find it?+
A selector is a label that points to a specific DKIM key in your DNS (e.g. 'google', 'selector1', 'k1'). You'll find it in your email or sending platform's DNS setup, or in the DKIM-Signature header of an email you sent. Leave it blank to skip the DKIM check.