A better send
starts here.
Check your setup, sharpen your email and work out the numbers. Pick a tool and get straight to it. No signup needed.
20 tools, ready when you are.
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Checkers Make sure your setup is ready to send.
Type a domain, get its SPF record with every mechanism explained, the DNS-lookup count against the limit of 10, and what to fix.
Open β DMARC checkerDMARC tells inboxes what to do with mail that fails authentication.
Open β DKIM checkerCheck the signature that helps prove your email is really from you.
Open β MX checkerCheck whether a domain is set up to receive email.
Open β Blacklist checkerChecks a sending domain or IP against the public DNS blacklists that allow browser lookups.
Open β Email checkerSyntax, the domain's mail server, disposable domains and role accounts, checked in your browser.
Open βGenerators Get the fiddly bits done.
Tick the providers that send mail for the domain, add any extra IPs, copy the record into a TXT entry at your DNS host.
Open β DMARC generatorAnswer two questions, copy one record.
Open β Sending domain generatorRule one of infrastructure: your primary domain never sends cold email.
Open β Signature generatorBuild a clean signature that keeps the focus on your message.
Open β Email permutatorName plus domain in, every common corporate email pattern out.
Open βCalculators Know your numbers before you send.
Three numbers in, your campaign judged against the benchmark that matters: interested replies per contact reached.
Open β Bounce rate calculatorTwo numbers in, one verdict out: your bounce rate against the thresholds that decide whether your next send lands.
Open β Inbox calculatorThe infrastructure math behind any serious campaign: contacts to touches to sends per day to inboxes to domains.
Open β Warmup plannerNew inboxes earn trust slowly.
Open βCopy tools Give your next email a second look.
Get a second opinion on your draft before it lands in someoneβs inbox.
Open β Spam word checkerSpot words that could make your email sound like a sales blast.
Open β Subject line analyzerType a subject line, see how it survives a phone screen, a spam filter and a skeptical human.
Open β Spintax testerPaste spintax like {Hi|Hey|Hello} {{firstName}}, count real variants, preview samples, and catch broken braces before launch.
Open β Inbox previewThe first thing your prospect sees is not your email.
Open βGet a plan for the people you want to reach and the messages worth testing. Built for your business. Free.