Pipefire email deliverability tools
Free email deliverability tools: SPF, DKIM, DMARC, blacklist and header checks, cold email scoring.
| Endpoint | https://pipefire.ai/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 16 tools · grade C (75) · pin ts_d67b65079a0343e934760cb067832288 · protocol 2025-06-18 |
| First / last listed | 2026-10-26 01:03 UTC / 2026-10-26 01:03 UTC |
| Grade over time | 2026-10-26: C (75), 16 tools |
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Tools: check_domain_email_setup check_dmarc check_spf check_dkim check_mx check_bimi check_mta_sts check_blacklists analyze_email_headers check_cold_email test_subject_line suggest_sending_domains guess_email_addresses generate_spf_record generate_dmarc_record generate_dkim_record
check_domain_email_setup | Check whether a domain is set up to send and receive email properly: MX, SPF, DKIM and DMARC in one go, each with pass/warn/fail, what was found, and how to fix it. Use when someone asks why their email goes to spam, whether their domain is set up right, or before sending cold email. params: domain*, selector |
check_dmarc | Check a domain's DMARC record: whether one exists at _dmarc, its policy (none, quarantine, reject), whether reports are collected, and outdated tags. Tells you whether the domain can be impersonated by email. params: domain* |
check_spf | Check a domain's SPF record: whether it exists, is valid, stays under the 10 DNS lookup limit, and ends with a sensible all mechanism. params: domain* |
check_dkim | Look up a domain's DKIM public key, trying the selectors Google Workspace, Microsoft 365 and common senders use, plus one you name. params: domain*, selector |
check_mx | List a domain's mail servers (MX records) and which provider handles its email. params: domain* |
check_bimi | Check a domain's BIMI record (logo in the inbox) and whether its DMARC policy is strict enough for BIMI to show. params: domain* |
check_mta_sts | Check a domain's MTA-STS policy, which forces encrypted delivery of incoming mail. params: domain* |
check_blacklists | Check whether a domain's sending IPs, or a single IPv4 address, are listed on the major email blacklists (Spamhaus, Barracuda, SpamCop and others), with removal links. params: target* |
analyze_email_headers | Read the raw headers of a received email: SPF, DKIM and DMARC results, alignment, the delivery path and delays. Use when someone pastes headers and asks why a message went to spam or failed authentication. params: headers* |
check_cold_email | Score a cold email (subject and body) out of 10 against the rules Pipefire checks its own emails with: length, reading level, the ask, subject line, and spam-filter wording. Returns each issue with why it matters and how to fix it. params: subject*, body*, kind |
test_subject_line | Score a cold email subject line out of 10: length, wording that hurts opens, and spam trigger words, with fixes. params: subject* |
suggest_sending_domains | Suggest lookalike sending domains for cold email (so the main domain is never put at risk), with live .com/.net availability. Give a business name or its website. params: brand* |
guess_email_addresses | List the likely email address formats for a person at a company domain (first@, first.last@, flast@ ...). Guesses only: verify before sending. params: first*, last, middle, domain* |
generate_spf_record | Build a valid SPF TXT record for a domain from the email services it sends with, with warnings about the 10-lookup limit. params: providers, includes, ip4, ip6, a, mx, strict |
generate_dmarc_record | Build a valid DMARC TXT record (to publish at _dmarc.yourdomain) from a policy and report addresses. params: domain*, policy*, rua, subdomainPolicy |
generate_dkim_record | Format a DKIM public key as the TXT record to publish at selector._domainkey.yourdomain. params: selector*, publicKey*, keyType |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.