Free Tools
The toolkit covers authentication records, DNS and MX lookups, email-header analysis, SMTP troubleshooting and campaign utilities. Tools complement documentation; a generated value is not automatically correct for every infrastructure.
Generate DKIM, SPF, DMARC records, create email IDs and test your subject lines — all free, no signup required. Each tool runs entirely in your browser.
Generate a real RSA DKIM key pair and DNS TXT record — free, right in your browser.
Open tool →Build a correct SPF TXT record for your domain in seconds — Google Workspace, Outlook and more.
Open tool →Generate a DMARC DNS record with the right policy and reporting settings, free and instant.
Open tool →Generate professional business email ID suggestions for your name and domain in seconds.
Open tool →Check length, spam trigger words and mobile preview cutoff before you hit send.
Open tool →Generate high-converting email subject line ideas for your next campaign.
Open tool →Create a clean, professional HTML email signature — copy and paste ready.
Open tool →Look up the MX records for any domain instantly to see which servers handle its mail.
Open tool →Build tagged campaign URLs to accurately track traffic in Google Analytics.
Open tool →Generate a BIMI record so your brand logo shows up next to your emails.
Open tool →Check your subject line or email copy for common spam trigger words.
Open tool →Generate a compliant unsubscribe footer with your address and opt-out link.
Open tool →Calculate open rate, CTR and click-to-open rate with benchmark context.
Open tool →More practical resources for marketers and email infrastructure teams.