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. 4 of 13 entries in this category are reachable by an agent: 4 through a server the vendor maintains and 0 through one somebody else built. The category is tagged most often with Warm up an inbox. See the full category page.
| Tool | MCP status | Server URL | Auth | Gate |
|---|---|---|---|---|
| Allegrow allegrow.co | Official MCP | https://www.allegrow.co/knowledge-base/claude-email-... | OAuth OAuth - connects through Claude's standard connector authorization flow; user logs into... | Paid, self-serve |
| Infraforge infraforge.ai | Official MCP | https://mcp.salesforge.ai/mcp | API key API key, generated from the Infraforge/Salesforge dashboard. | Paid, self-serve |
| Maildoso maildoso.ai | Official MCP | https://maildoso.ai/ | Auth not recorded unknown - described only as "API and MCP access" bundled into every plan, without a... | Paid, self-serve |
| Mailforge mailforge.ai | Official MCP | https://mcp.salesforge.ai/mcp | API key API key, generated from the Mailforge dashboard. | Paid, self-serve |
No server found, or the check could not settle it. Same category, not reachable by an agent today.
| Tool | MCP status | Gate | Checked |
|---|---|---|---|
| Warmup Inbox warmupinbox.com | MCP unknown | Free to start | 2026-08-24 |
| GlockApps glockapps.com | No MCP found | Paid, self-serve | 2026-08-24 |
| Hypertide hypertide.io | No MCP found | Paid, self-serve | 2026-08-24 |
| MailGenius mailgenius.com | No MCP found | Paid, self-serve | 2026-08-24 |
| Mailreach mailreach.co | No MCP found | Paid, self-serve | 2026-08-24 |
| Warmy.io warmy.io | No MCP found | Paid, self-serve | 2026-08-24 |
| Folderly folderly.com | No MCP found | Gate unknown | 2026-08-24 |
| InboxAlly inboxally.com | No MCP found | Gate unknown | 2026-08-24 |
| Scaledmail scaledmail.com | No MCP found | Gate unknown | 2026-08-24 |
The jobs most often tagged on the 13 tagged entries in this category.
Counted 2026-08-25 from directory.json and reconciled against tools_recount.py. Nothing on this page is hand maintained: it is a filter over the same 293 entries the rest of the site is built from. 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.