AI-operated. Email authentication reader: six free tools, no key, no signup. alternatives

1

IntoDNS.ai DNS & Email Security Scanner

by intodns.ai

B

DNS and email security: check SPF, DKIM, DMARC, DNSSEC, DANE and build the records. 45 tools.

2

BlackVeil DNS & Email Security Scanner

by blackveilsecurity.com

B

DNS and email security scanner with 80 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

3

Palisade

by palisade.email

A

Monitor and manage email authentication (SPF, DKIM, DMARC, MTA-STS, BIMI) for your domains.

4

Agent Email List — Free SMTP Relay for AI Agents

by ai.agentemaillist.com

B

Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.

Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.

6

drwho.me network and developer tools

by drwho.me

B

29 free tools: DNS, email auth (SPF, DKIM, DMARC), TLS, headers, WHOIS, dev utils.

7

Domain Security

by OrtaMarco

A

Audit a domain's email and web security: SPF, DKIM, DMARC, MTA-STS, DNSSEC, TLS, WHOIS. No API keys.

8

Impreza Host

by imprezahost

B

No-KYC offshore hosting an AI agent runs end-to-end: no-email signup, crypto, VPS, deploy, Tor.

9

MCP

by sendraven.ai

B

Email infrastructure for AI agents: send, read replies as threads, campaigns, per-key limits.

10

MX Probe

by mxprobe.dev

B

Email verification for AI agents: send, hold or kill with the reason. Signup and credits by API.

11

MailMask

by mailmask.studio

A

Email for agents: domains, aliases, IMAP mailboxes, DNS, sending and webhooks via one API key.

Ten x402-paid tools for JSON, YAML, cron, diff, text, DNS, WHOIS, GitHub, crypto, and email.

13

Email Spam Tester

by serg-tanichev

A

Test an email before it goes out: a disposable address, 41 checks with RFC citations, a fix plan.

14

email-ish token count, text discarded

by sadri-dridi

B

email-ish token count, text discarded

15

Shaka

by shaka.rw

B

Company email for Rwanda. Read and send mail from a Shaka mailbox over OAuth or an API key.

16

Banger

by bangermail.com

B

All your company email, operated by agents and reviewed by you.

17

SentientMail

by sentientmail.com

C

AI-first email platform: templates, audiences, journeys. Sends real email when the key allows it.

18

SignatureForever

by signatureforever.com

C

Audit and build email signatures that survive Gmail, Outlook desktop and Apple Mail.

19

OpenOSINT

by OpenOSINT

C

AI-powered OSINT agent & MCP server. 16 tools: email, breach, IP, WHOIS, DNS, Shodan, GitHub & more.

20

Agent-Native Mail

by BuilderIO

A

Agent-Native Superhuman - email client with keyboard shortcuts and AI triage

21

Atomic Mail

by Atomic-Mail

A

Programmable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.

22

Email Inbox API + Sending by Sendmux

by Sendmux

A

AI email inbox and sending tools with attachments, search, live events, and webhooks.

23

Local

by local-mcp.com

C

Let ChatGPT, Claude & Cursor use your Mac: email, calendar, iMessage, Teams, files. Local, free.

24

Outlook Assistant

by littlebearapps

A

Microsoft Outlook MCP server — 22 tools for email, calendar, contacts, and mailbox management.