# Sending infrastructure - GTM jobs an agent can ask for > Own the mailboxes, the reputation and the placement. 3 jobs and 26 tagged entries in The GTM MCP Directory. *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).* --- [Directory](../index.md) / [By job](index.md) / Sending infrastructure **Job family** ## Sending infrastructure Own the mailboxes, the reputation and the placement. 3 jobs, 26 tagged entries, 20 distinct entries across the family. - [Warm up an inbox](warm-up-inbox.md) - 13 tools · 7 official MCP. Build or repair sender reputation by generating engagement against a mailbox over time. - [Provision sending infrastructure](provision-sending-infrastructure.md) - 9 tools · 5 official MCP. Buy and configure domains, mailboxes, IPs and DNS authentication for outbound sending. - [Check inbox placement](check-inbox-placement.md) - 4 tools · 1 official MCP. Measure where mail actually lands: inbox, promotions or spam, per provider. ### Every entry tagged with a job in this family Ordered by the published rule: official MCP first, then community, then unknown, then n/a, then none-found; within each band gate order is free, paid, enterprise-leaning, enterprise-only, unknown; then alphabetical by name. Computed, never curated, never purchasable. - [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) · [Email Deliverability](../categories/email-deliverability.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) · [Email Deliverability](../categories/email-deliverability.md) - [Instantly](../tools/instantly.md) instantly.ai Cold email sending platform providing mailbox infrastructure, warmup, deliverability management, sequencing, and lead sourcing. [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) · [Engagement & Outbound](../categories/engagement-outbound.md) - [lemlist](../tools/lemlist.md) lemlist.com Multichannel sales engagement platform combining lead database/enrichment, email/LinkedIn/call/SMS sequencing, and a unified inbox. [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) · [Engagement & Outbound](../categories/engagement-outbound.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) · [Email Deliverability](../categories/email-deliverability.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) · [Email Deliverability](../categories/email-deliverability.md) - [Reply.io](../tools/reply-io.md) reply.io Multichannel sales engagement platform for email, LinkedIn, call, and SMS outreach with an AI SDR product layered on top. [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) · [Engagement & Outbound](../categories/engagement-outbound.md) - [Snov.io](../tools/snov-io.md) snov.io A B2B prospecting and outreach platform - finds and verifies emails/contacts, enriches company and contact records, manages prospect lists and a lightweight CRM, and runs email drip campaigns plus LinkedIn... [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) · [Data & Enrichment](../categories/data-enrichment.md) - [Super Send](../tools/super-send.md) supersend.io Cold email sequencing platform providing dedicated, warmed sending infrastructure with adaptive pacing based on live deliverability signals. [Official MCP](../mcp/official.md) · [Paid, self-serve](../gates/paid.md) · [Engagement & Outbound](../categories/engagement-outbound.md) - [Smartlead](../tools/smartlead.md) smartlead.ai Cold email outreach platform for managing campaigns across many mailboxes, with built-in deliverability infrastructure and a unified reply inbox. [Community MCP](../mcp/community.md) · [Paid, self-serve](../gates/paid.md) · [Engagement & Outbound](../categories/engagement-outbound.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. [MCP unknown](../mcp/unknown.md) · [Free to start](../gates/free.md) · [Email Deliverability](../categories/email-deliverability.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... [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) · [Email Deliverability](../categories/email-deliverability.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... [No MCP found](../mcp/none-found.md) · [Paid, self-serve](../gates/paid.md) · [Email Deliverability](../categories/email-deliverability.md) - [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) · [Email Deliverability](../categories/email-deliverability.md) - [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) · [Email Deliverability](../categories/email-deliverability.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) · [Email Deliverability](../categories/email-deliverability.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) · [Email Deliverability](../categories/email-deliverability.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) · [Gate unknown](../gates/unknown.md) · [Email Deliverability](../categories/email-deliverability.md) - [Reply.io (Jason AI)](../tools/reply-io.md) reply.io A multichannel sales engagement platform whose AI layer ("Jason AI," per widely reported branding) generates outreach emails/follow-ups and automates sequencing across email, calls, and tasks. [No MCP found](../mcp/none-found.md) · [Gate unknown](../gates/unknown.md) · [AI SDRs](../categories/ai-sdr-agents.md) · Cross listed, canonical home is Engagement & Outbound - [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) · [Gate unknown](../gates/unknown.md) · [Email Deliverability](../categories/email-deliverability.md)