# Email Deliverability: 28 tools, 4 with an official MCP server > Inbox-placement testing, warmup, and DNS-authentication (SPF/DKIM/DMARC) tooling that keeps... 28 tools counted, 4 with an official MCP server and 2 free to start. *Markdown twin of the HTML page at the same path. Same content, no navigation, no styling, no scripts. Links below point at other twins. Site map for machines: [llms.txt](../llms.txt). The whole dataset: [directory.json](../data/directory.json).* *Maintained by Andrew McGuire (https://andrewcmcguire.com), who also publishes https://gtmsignals.co and https://justsaid.ai.* --- [Directory](../index.md) / [By category](index.md) / Email Deliverability **09 · email-deliverability** ## Email Deliverability Inbox-placement testing, warmup, and DNS-authentication (SPF/DKIM/DMARC) tooling that keeps cold-outbound infrastructure out of spam. Standing risk worth flagging once here rather than per entry: automated warmup - seed inboxes auto-opening/replying/starring your mail to fake engagement - sits in real tension with mailbox-provider ToS. Google banned automated email warm-up services for Gmail accounts in a January 2023 policy change, and Google/Yahoo/Microsoft jointly enforce bulk-sender rules (sub-0.3% spam complaints, sub-2% bounce) as of May 2025; GMass shut its own warm-up feature down as a result. Several vendors below (InboxAlly explicitly) market themselves as the safer alternative to network-based/bot-driven warmup for exactly this reason. - **entries in this file**: 28 - **Official MCP**: 4 - **Community MCP**: 6 - **MCP unknown**: 1 - **No MCP found**: 17 - **ship a CLI (official) as of 2026-09-27**: 2 - **Free to start**: 2 - **Paid, self-serve**: 10 - **Gate unknown**: 16 Source file: 09-email-deliverability.md · content sha256 4188fcff3bd86f88... · counts reconciled against tools_recount.py at build time. - [The 10 with an MCP server](../lists/mcp-email-deliverability.md) - [Warm up an inbox](../jobs/warm-up-inbox.md) - [Provision sending infrastructure](../jobs/provision-sending-infrastructure.md) - [Check inbox placement](../jobs/check-inbox-placement.md) - [Verify an email is deliverable](../jobs/verify-email-deliverable.md) - [Allegrow](../tools/allegrow.md) allegrow.co B2B email verification and deliverability platform - resolves catch-all/secure-email-gateway addresses that legacy verifiers mark "unknown," sends warm-up email to real B2B accounts, and runs hourly... [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) - [Infraforge](../tools/infraforge.md) infraforge.ai Private cold-email infrastructure platform (part of the same Salesforge "Forge Stack" as Mailforge) offering dedicated IPs, automated DNS setup, and pre-warmed domains for high-volume senders who want more... [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) - [Maildoso](../tools/maildoso.md) maildoso.ai Cold-outreach mailbox and domain infrastructure provider - sells pre-configured SMTP mailboxes and Google Workspace accounts (with SPF/DKIM/DMARC already set up) built specifically for cold email sending,... [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) - [Mailforge](../tools/mailforge.md) mailforge.ai Shared cold-email infrastructure platform (part of the Salesforge "Forge Stack") - automates workspace setup, domain purchase/checks, mailbox creation, DNS records, forwarding, and domain masking for... [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) - [AnchoredIP](../tools/anchoredip.md) api.anchoredip.com Dedicated static outbound IPv4 over WireGuard. Free 7-day trial, no card, no sales call. [Community MCP](../mcp/community.md) · [Gate unknown](../gates/unknown.md) - [Mailcannon](../tools/mailcannon.md) thinkandautomate.dev AI-powered email outreach platform - send campaigns with deliverability tracking. [Community MCP](../mcp/community.md) · [Gate unknown](../gates/unknown.md) - [Mamba Domain Deliverability MCP](../tools/mamba-domain-deliverability-mcp.md) github.com MCP server for the Mamba Labs Domain Deliverability Checker actor: SPF, DKIM, DMARC, MX, blacklist, catch-all, domain age. Clay-ready. - mambalabsdev/mcp-domain-deliverability-checker [Community MCP](../mcp/community.md) · [Gate unknown](../gates/unknown.md) - [Outreach Deliverability MCP by closermethod](../tools/outreach-deliverability-mcp-by-closermethod.md) github.com Outreach Deliverability MCP for AI agents. Channel-safety layer for cold outreach on email, LinkedIn, Instagram DM, X DM: volume limits, SPF/DKIM/DMARC sender setup, spam-trigger auditing, benchmark... [Community MCP](../mcp/community.md) · [Gate unknown](../gates/unknown.md) - [Resend](../tools/resend.md) resend.com The best way to reach humans instead of spam folders. Deliver transactional and marketing emails at scale. [Community MCP](../mcp/community.md) · [Gate unknown](../gates/unknown.md) · CLI: resend - [Volanea](../tools/volanea.md) volanea.com Transactional email, campaigns, and automation on one contact graph. Start with 1,000 free credits every month, then $5/mo for 7,500 emails. [Community MCP](../mcp/community.md) · [Gate unknown](../gates/unknown.md) - [GlockApps](../tools/glockapps.md) glockapps.com Email deliverability testing and monitoring platform - Inbox Insight sends a test email to real seed accounts across 60+ providers (Gmail, Yahoo, Outlook, Apple Mail, AOL, etc.) and reports exact... [MCP unknown](../mcp/unknown.md) · [Paid, self-serve](../gates/paid.md) - [Scaledmail](../tools/scaledmail.md) scaledmail.com Cold-email infrastructure provider - sets up sending domains, configures DNS authentication (SPF/DKIM/DMARC) from day one, and rotates inboxes so outbound sequences land in the primary tab. [No MCP found](../mcp/none-found.md) · [Free to start](../gates/free.md) - [Warmup Inbox](../tools/warmup-inbox.md) warmupinbox.com Email warmup and deliverability platform running a network of 30,000+ real inboxes that exchange natural-looking email (opens, replies, stars) with a customer's connected accounts to build sender reputation. [No MCP found](../mcp/none-found.md) · [Free to start](../gates/free.md) - [Hypertide](../tools/hypertide.md) hypertide.io Automated cold-email infrastructure provider - high-deliverability Microsoft Entra/Google mailboxes with dedicated domains/IPs per order, pre-configured SPF/DKIM/DMARC, set up in 4-6 hours (vendor claims fully... [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) - [InboxAlly](../tools/inboxally.md) inboxally.com Email warmup and reputation-repair service that adds real seed inboxes into a customer's actual campaigns; those seed accounts perform browser-level engagement (open, read, reply, mark important, move out of... [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) · CLI: inboxally - [MailGenius](../tools/mailgenius.md) mailgenius.com Free/paid email deliverability and spam-testing tool - checks SPF/DKIM/DMARC authentication, scans blacklists, previews inbox rendering across Gmail/Outlook, and scores spam likelihood. [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) · CLI: genius (community) - [Mailreach](../tools/mailreach.md) mailreach.co Email warmup and deliverability platform - automates inbox-to-inbox warmup conversations, tracks a "Heat Score" reputation metric, and monitors blacklist/authentication status across Gmail, Outlook, and any... [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) - [Warmy.io](../tools/warmy-io.md) warmy.io Email warmup and deliverability platform with an "AI-driven engagement engine" - customizable warm-up topic/language selection, works across Gmail, Outlook, Zoho, and Amazon SES, with a real-time... [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) - [BounceBan](../tools/bounceban.md) bounceban.com Best at verifying emails that are catch-all or protected by SEGs (Secure Email Gateway). Single email verifications are free and unlimited. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [Debounce](../tools/debounce.md) debounce.io Validate emails before you send - clean bulk lists, block bad signups in real time, and reduce catch-all uncertainty without overclaiming accuracy. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [Emailable](../tools/emailable.md) emailable.com Emailable is the email verification service trusted by 300,000+ businesses to confirm addresses are real and safe to send to, with a 99% deliverability guarantee. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [Folderly](../tools/folderly.md) folderly.com Email deliverability platform combining a spam/inbox-placement test, ongoing deliverability monitoring, technical DNS setup, and spam-trigger content review for B2B outbound teams. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) · CLI: folderly (community) - [Lightmeter](../tools/lightmeter.md) lightmeter.io Managed Sales Email Delivery For Cold Outreach [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [Listmint](../tools/listmint.md) listmint.io Listmint offers real-time catch-all email verification and 50%+ more valid emails out of your lead lists. Sign up for free to get started. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [Mailwarm](../tools/mailwarm.md) mailwarm.com Email warmup tool to avoid the spam folder and improve inbox placement. Since 2020, Mailwarm's deliverability team builds sender reputation so emails reach the inbox. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [Meer](../tools/meer.md) meerapi.com Automatically screen your lead data against Do Not Call lists to avoid penalties and improve rep performance. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [No2bounce](../tools/no2bounce.md) no2bounce.com Detect invalid, catch-all & risky emails before they damage your sender reputation. Try No2Bounce's bounce email validation free, 100 verifications included [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) - [ZeroBounce](../tools/zerobounce.md) zerobounce.net Optimize your email strategy with ZeroBounce. We offer top-tier email validation, list cleaning, and address verification to reduce spam traps and enhance deliverability. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md)