Free cold email tools
Quick checks for anyone sending cold email. Free, no sign-up. Each one links to the cold email guide that explains the result.
Domain checker
Check a sending domain for cold email in one go: SPF, DKIM, DMARC and MX records, each with a plain-English fix. Free, no sign-up.
Open the domain checker →Deliverability test
Send one email to a one-off address and see what a receiving server sees: SPF, DKIM, DMARC, tracking, links and the words. Free, no sign-up, nothing kept.
Open the deliverability test →Blacklist checker
Check a domain or IP against SpamCop, Barracuda, UCEPROTECT, PSBL and Mailspike. For a domain, every sending IP is checked. Free, no sign-up, nothing stored.
Open the blacklist checker →BIMI checker
Check a domain’s BIMI record: is it published, is the logo an SVG over HTTPS, is there a mark certificate, and is DMARC strict enough for the logo to show. Free, no sign-up.
Open the bimi checker →MTA-STS checker
Check a domain’s MTA-STS setup: the _mta-sts record, the policy file over HTTPS, whether it covers every mail server, its mode, and TLS-RPT reporting. Free, no sign-up.
Open the mta-sts checker →SPF checker
Check a domain’s SPF record: is there exactly one, does it end correctly, and how many of the 10 DNS lookups does it use. Plain-English fix for each problem. Free, no sign-up.
Open the spf checker →DMARC checker
Check a domain’s DMARC record: is it published at _dmarc, what policy it sets, and whether reports are going anywhere. Plain-English fix for each problem. Free, no sign-up.
Open the dmarc checker →DKIM checker
Look up a domain’s DKIM key at the common selectors or your own, and check it is live and long enough. Plain-English fix for each problem. Free, no sign-up.
Open the dkim checker →MX lookup
Look up a domain’s MX records and see where its email goes, in priority order, and whether it can receive replies at all. Free, no sign-up.
Open the mx lookup →AI cold email generator
Describe your business, offer and audience and get a short cold email written to the rules that get replies, scored by our cold email checker. First email free, no sign-up.
Open the ai cold email generator →Cold email checker
Paste a cold email and its subject line and get a score out of 10 against the rules Pipefire checks its own emails with: length, subject line, reading level, the ask, and the phrases that cost meetings. Free, nothing stored.
Open the cold email checker →Email header analyzer
Paste the headers of an email you received and see what the receiving server decided: SPF, DKIM and DMARC, alignment with the From domain, and the route with delays. Free, nothing stored.
Open the email header analyzer →Subject line tester
Type a cold email subject line and get a score out of 10 against the rules Pipefire writes its own subjects to: length, case, sales language and whether it gives the pitch away. Free, nothing stored.
Open the subject line tester →Email spam checker
Paste a cold email and see which words and habits look like bulk promotion to a spam filter: money and urgency language, capitals, extra links and shorteners, plus our writing rules. Free, nothing stored.
Open the email spam checker →Email verifier
Type an email address and find out if it exists before you send: valid, invalid, catch-all, shared inbox or disposable, explained in plain English. First check free each day.
Open the email verifier →Sending domain generator
Type your business name or website and get lookalike sending domains for cold email, such as getyourbrand.com, checked against the registry so you see which are free to register.
Open the sending domain generator →Email permutator
Type a name and a company domain and get every common business email format, most likely first, ready to copy and verify. Free, runs in your browser.
Open the email permutator →SPF record generator
Build a valid SPF record for your sending domain: pick your mail host, add other senders, and copy the TXT record with the 10-lookup limit checked. Free, runs in your browser.
Open the spf record generator →DMARC record generator
Build a DMARC record to the current standard (RFC 9989): pick a policy, add a reports address, and copy the TXT record for _dmarc. Free, runs in your browser.
Open the dmarc record generator →DKIM record generator
Paste a DKIM public key and selector and get the exact TXT record and host name to publish, with key length checked. Free, runs in your browser, nothing is uploaded.
Open the dkim record generator →