Inboxlogy Free Tools
Free Email Tools
18 free tools for cold email and deliverability — check your DNS, fix SPF/DKIM/DMARC, scan for spam triggers, plan your warm-up and more. No sign-up, no cost, no catch.
Check your DNS
DNS Record Checker
Instantly look up A, AAAA, MX, TXT, NS and CNAME records for any domain. Free, no sign-up.
Open tool → 📬MX Lookup
Find the mail servers (MX records) for any domain, in priority order, and detect the email provider. Free.
Open tool → 🛡️SPF Checker
Check your domain's SPF record: syntax, the all-mechanism, and the critical 10-DNS-lookup limit. Free.
Open tool → ✅DMARC Checker
Check your DMARC record and understand your policy, alignment and reporting setup in plain English. Free.
Open tool → 🔑DKIM Checker
Look up and validate your domain's DKIM record by selector — key presence, type and length. Free, no sign-up.
Open tool →Generate records
SPF Generator
Build a valid SPF record for Google, Microsoft 365, SendGrid, Mailgun and more — with a live DNS-lookup count. Free.
Open tool → ⚙️DMARC Generator
Create a valid DMARC record with the right policy, reporting address and strict alignment. Free, no sign-up.
Open tool → ✍️Email Signature Builder
Design a clean, professional HTML email signature and copy it straight into Gmail or Outlook. Free.
Open tool → 🗝️DKIM Generator
Generate a DKIM keypair (2048-bit RSA) in your browser — get the public DNS record and private key. Free & private.
Open tool → 🖼️BIMI Generator
Generate a BIMI record to show your brand logo in inboxes — plus the full prerequisite checklist. Free.
Open tool →Test & score
Email Header Analyzer
Paste raw email headers to see SPF/DKIM/DMARC results, relay hops and sender details. Private — runs in your browser.
Open tool → 🚫Blacklist Checker
Check if an IP or domain is on 15+ major email blacklists (Spamhaus, Barracuda, SpamCop and more). Free.
Open tool → 📱Mobile Email Preview
Preview how your HTML email looks on a phone before you send. Free, private — renders in your browser.
Open tool → 🛑Spam Word Checker
Scan your subject and body for spam-trigger words and formatting red flags before you send. Free.
Open tool → ♿Email Accessibility Checker
Check your email HTML for alt text, link clarity, font size and structure issues. Free, in-browser.
Open tool → ↩️Email Bounce Analyzer
Paste a bounce message or SMTP error to learn if it's a hard or soft bounce, why, and what to do. Free.
Open tool →Plan & ramp
Email Warm-Up Calculator
Get a safe day-by-day warm-up ramp schedule for your cold email mailboxes. Free, instant.
Open tool → ⏰Best Time to Send Email
Find the best days and times to send cold email by your prospects' timezone and audience. Free.
Open tool →Done checking? Start sending that actually lands.
Inboxlogy gives you genuine Google & Microsoft mailboxes with dedicated US & EU IPs, automated SPF/DKIM/DMARC and 100% ownership — from $2.80/mailbox.
Get started →