MCP Server

Powerline Email Tools

ai.powerline/email-tools
Marketing & Advertising Security Public & reachable MCP 2026-07-28

What this MCP does

Analyzes email authentication, DNS records, delivery headers, blacklist status, and spam-related copy risks.

analyze_headers
Email header analyzer
Parse raw email headers: the Received delivery path with per-hop delays, the receiving server's SPF/DKIM/DMARC verdicts, DMARC alignment of the From domain, DKIM signatures, the sending IP, and bulk-sender requirements such as one-click unsubscribe.
Read only Open world Idempotent
Input schema
{'type': 'object', 'required': ['headers'], 'properties': {'headers': {'type': 'string', 'description': 'The raw header block (everything above the message body).'}}, 'additionalProperties': False}
check_blacklists
DNS blacklist lookup
Check an IPv4 address against about 18 IP blacklists (SpamCop, Barracuda, UCEPROTECT, PSBL, Mailspike, ...) or a domain against domain blacklists. Each list is verified with its test entries first, so lists that refuse public resolvers (such as Spamhaus) are reported as unavailable rather than clean.
Read only Open world Idempotent
Input schema
{'type': 'object', 'required': ['target'], 'properties': {'target': {'type': 'string', 'description': 'IPv4 address or domain.'}}, 'additionalProperties': False}
check_domain
Email domain health check
Run every email-authentication check on a domain (SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, BIMI, plus domain and mail-server blacklists) and return a score out of 100, per-check findings and a prioritized fix list. Use this first when asked whether a domain is set up correctly to send email.
Read only Open world Idempotent
Input schema
{'type': 'object', 'required': ['domain'], 'properties': {'domain': {'type': 'string', 'description': 'Domain name, e.g. example.com. URLs and email addresses are accepted; the domain part is used.'}, 'dkim_selector': {'type': 'string', 'description': 'DKIM selector (the s= value from a DKIM-Signature header). Optional; common selectors are tried when omitted.'}}, 'additionalProperties': False}
check_record
Check one DNS email record
Look up and validate a single email DNS record for a domain, explaining each tag. record is one of spf, dmarc, dkim, bimi, mta-sts, tls-rpt, mx. SPF counts the 10-lookup limit; DMARC checks policy, reporting and external report authorization; DKIM sizes the key; MTA-STS fetches the policy file and compares it with the MX hosts; BIMI checks the logo (SVG Tiny PS) and mark certificate.
Read only Open world Idempotent
Input schema
{'type': 'object', 'required': ['domain', 'record'], 'properties': {'domain': {'type': 'string', 'description': 'Domain name, e.g. example.com. URLs and email addresses are accepted; the domain part is used.'}, 'policy': {'type': 'string', 'description': 'MTA-STS only: policy file text to check instead of fetching it. Optional.'}, 'record': {'enum': ['spf', 'dmarc', 'dkim', 'bimi', 'mta-sts', 'tls-rpt', 'mx'], 'type': 'string'}, 'selector': {'type': 'string', 'description': 'DKIM or BIMI selector. Optional.'}}, 'additionalProperties': False}
check_spam_words
Email copy spam check
Scan an email subject and body (plain text or HTML) for spam-trigger phrases by category, ALL-CAPS, exclamation runs, emoji, URL shorteners and image-heavy HTML. Returns a low/medium/high risk reading and, optionally, a rule-based rewrite.
Read only Open world Idempotent
Input schema
{'type': 'object', 'properties': {'body': {'type': 'string', 'description': 'Plain text or HTML.'}, 'rewrite': {'type': 'boolean', 'description': 'Also return a calmer rewrite of the subject (and of a plain-text body).'}, 'subject': {'type': 'string'}}, 'additionalProperties': False}
Added
check_spam_words
Oct. 3, 2026, 2:40 a.m.
Added
analyze_headers
Oct. 3, 2026, 2:40 a.m.
Added
check_blacklists
Oct. 3, 2026, 2:40 a.m.
Added
check_record
Oct. 3, 2026, 2:40 a.m.
Added
check_domain
Oct. 3, 2026, 2:40 a.m.