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Field notes from the Bavimail team

Short-form engineering writing on email APIs, deliverability, inbound parsing, and what changes when your sender is an AI agent rather than a human.

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Fresh content is added as we ship. Each post is a focused read — no listicles.

LinkedIn automation limits

20 to 40 connection requests a day, 100 a week, 100 messages a day.

Mailgun Pricing 2026: Plans, Overages, and What You Actually Pay

Mailgun Send pricing explained: Free, Basic, Foundation, and Scale allowances, overages, validation, dedicated IPs, and worked 10K, 50K, and 200K examples.

Amazon SES Pricing in 2026: Essentials vs A La Carte Costs

Compare Amazon SES Essentials at $0.16 per 1,000 emails with $0.10 a-la-carte pricing, plus dedicated IP, attachment, and inbound costs.

Bavimail vs Brevo (2026): Pricing, Multi-Channel, MCP, Honest Tradeoffs

Bavimail vs Brevo (formerly Sendinblue) head-to-head as of May 2026. Bavimail Pro $5/mo for full-stack email send + inbound + 12-tool MCP with prompt-injection wrapper + HMAC-SHA256 signed webhooks. Brevo: multi-channel marketing/transactional platform (email + SMS + WhatsApp + push + CRM) with a 193-tool MCP server auto-generated from their OpenAPI spec, 14+ years deliverability infra since 2007, but no cryptographic webhook signing (IP allowlist + basic auth + bearer token + custom headers, none cryptographic). Bavimail wins on transactional-only purpose-built tier, HMAC-signed webhooks, prompt-injection wrapper. Brevo wins on multi-channel breadth, CRM depth, 193-tool MCP surface.

Bavimail vs Mailtrap (2026): Sandbox vs Send-and-Receive, Honest Tradeoffs

Bavimail vs Mailtrap head-to-head as of May 2026. Bavimail Pro $5/mo (or $48/yr, $4/mo equivalent) (50K, full-stack send + inbound + 12-tool MCP with prompt-injection wrapper, per-alias inbox primitive) vs Mailtrap Email Sending Basic $15/mo (10K, send-focused) plus Email Testing sandbox ($14/mo+ for paid sandbox tiers, 50/mo free). Bavimail wins on price ($10/mo lower at 10K), first-class inbound webhooks, prompt-injection wrapper. Mailtrap wins on sandbox-testing primitive for development workflows and 24-tool MCP per docs.mailtrap.io. Includes pricing math, feature matrix, 5 FAQs.

6 AgentMail Alternatives in 2026 (Pricing Compared)

Compare 6 AgentMail alternatives by pricing, included email volume, inbound architecture, MCP support, and the agent workflow each platform fits best.

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AgentMail Pricing 2026: Free = 3 Inboxes, Then the $20 to $200 Cliff

AgentMail pricing explained: 3 free inboxes, Developer at $20/mo, Startup at $200/mo, included email limits, per-inbox math, and the upgrade cliffs.

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AgentMail vs Amazon SES (2026): Pricing, Inbound, and MCP Coverage

AgentMail is a managed per-agent inbox platform with production-ready MCP. Amazon SES is raw email infrastructure at $0.10 per 1,000 emails with a sample-only MCP server. Honest 2026 comparison: SES wins on per-email cost above 50K/mo, AgentMail wins on inbox primitives and webhook reliability. Includes realistic SES cost stack (base + dedicated IP + VDM) and the 2024 free-tier change you may have missed.

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Best Email API for AI Agents (2026): Inbox-per-Agent, MCP, and Real Pricing

Compare 7 email APIs for AI agents by dedicated inbox support, production MCP tools, inbound payloads, prompt-injection safeguards, and real 2026 pricing.

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Best Email APIs for Developers (2026): 8 Providers Reviewed

Founder-POV review of the eight email APIs developers should actually consider in 2026. Bavimail ($5/mo Pro, full-stack send + inbound + 12-tool MCP), Resend ($20 Pro 50K, broadest SDKs + April 2026 MCP), Postmark ($16.50 after August 2025 restructure, top deliverability), Twilio SendGrid ($19.95+, no free tier since May 2025), Amazon SES ($0.10/1K, build inbox yourself), Mailgun ($15-$90, Flex doubled Dec 2025), AgentMail ($20 Developer, agent-inbox primitive), Mailtrap (sandbox + sending bundle). Scored on SDK breadth, MCP quality, free tier, DX, deliverability.

Best Postmark Alternatives in 2026: 6 Email APIs Compared

Six honest Postmark alternatives compared with current pricing as of May 2026. Bavimail ($5/mo Pro for full-stack send + inbound + 12-tool MCP), Resend ($20 Pro 50K with React Email + April 2026 MCP), Twilio SendGrid ($19.95 Essentials, dedicated IPs at Pro), Mailgun ($15-$90 with Optimize suite), Amazon SES ($0.10/1K), AgentMail ($20/mo Developer with create_inbox primitive). Acknowledges what Postmark wins (98%+ inbox placement, Message Streams isolation, 15+ years deliverability reputation) so readers pick the right swap.

Best Resend Alternatives 2026 (Cheaper + Inbound-Capable)

Compare 6 Resend alternatives with lower entry prices, stronger inbound workflows, per-agent inboxes, current 2026 pricing, and honest tradeoffs.

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Best SendGrid Alternatives in 2026: 6 Email APIs Compared

Six honest SendGrid alternatives after Twilio killed the permanent free tier on May 27 2025. Bavimail ($5/mo Pro for full-stack send + inbound + 12-tool MCP), Resend ($20 Pro 50K + React Email + April 2026 MCP), Postmark ($16.50/mo Pro with August 2025 restructure + top deliverability), Mailgun ($15-$90 + Optimize suite), Amazon SES ($0.10/1K), AgentMail ($20/mo Developer + create_inbox primitive). Acknowledges what SendGrid still wins (Essentials 50K at $19.95 and Pro 100K at $89.95 with 1 dedicated IP managed warmup, 15+ years deliverability infra, subuser isolation) so readers pick the right swap.

Email API for AI Agents: 7 Platforms Compared (2026)

Seven email APIs scored against the four criteria that actually matter for AI agent workflows: MCP server quality, webhook payload completeness, per-agent inbox primitive, and prompt-injection safety. Covers Bavimail (12-tool MCP with untrusted-third-party-content wrapper, $5/mo Pro), AgentMail (17-tool MCP with first-class create_inbox, $20/mo Developer), Resend (10 tool groups, metadata-only inbound webhook), Postmark (4 outbound-only Labs MCP), Twilio SendGrid (official MCP is docs-search only, not for sending email), Mailgun (50+ MCP operations, store-route inbound), Amazon SES (sample MCP not for production). Primary-source verified May 2026.

Transactional Email API Comparison 2026: 7 Providers, Real Prices Side by Side

Compare 7 transactional email APIs side by side with current 2026 prices, free tiers, inbound support, MCP coverage, and the workload each provider fits best.

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AgentMail vs Resend (2026): MCP, Inbound, and AI-Agent Coverage

AgentMail is the AI-agent inbox platform with native per-inbox storage, threading, and MCP inbox-read tools. Resend is the developer-favorite transactional API with 9 official language SDKs plus a Chat SDK adapter, React Email pairing, a first-party MCP server (10 tool groups, April 7 2026), and catch-all inbound (November 2025). Honest 2026 comparison of pricing (Resend Pro 50k $20/mo vs AgentMail Developer $20/mo), inbound architecture (per-inbox vs catch-all), webhook payloads (inline body vs metadata-only), and MCP scope.

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AgentMail vs Mailgun (2026): Pricing, Inbound, and AI-Agent Coverage

AgentMail is the AI-agent inbox platform with native per-inbox storage and MCP-native inbound reads + replies. Mailgun is the high-volume developer transactional service with a deliverability suite and a first-party MCP server (v2.0.0, April 22 2026) that covers admin operations plus stored-message retrieval by key, but no inbox, thread, search, or reply toolset. Honest 2026 comparison of pricing (Mailgun Scale $90/mo for 100K with dedicated IP), inbound (webhook routes vs native inbox), and MCP tool coverage.

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AgentMail vs Postmark (2026): Pricing, Inbound, and AI-Agent Coverage

AgentMail is the AI-agent inbox platform with native per-inbox storage and MCP-native inbound. Postmark is the developer transactional incumbent with 15+ years of deliverability reputation. Honest 2026 comparison of pricing (Postmark Pro is $16.50/mo for 10K), inbound (gated to Postmark Pro+ vs included on every AgentMail tier), webhook security (AgentMail signs, Postmark does not), and MCP server coverage.

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AgentMail vs SendGrid (2026): Pricing, Limits, and AI-Agent Support

AgentMail is an AI-agent inbox platform with a $20/mo developer tier and native MCP server. SendGrid is the high-volume transactional incumbent starting at $19.95/mo without a permanent free tier. Honest 2026 comparison of pricing, inbound, webhooks, and developer experience, with where each one wins.

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Bavimail launches on Product Hunt for Vercel Day 2026

Bavimail launches on Product Hunt for Vercel Day 2026. One email API for transactional sends, signed-webhook inbound, and per-agent inboxes for AI. Free for 3 months on Pro for PH users.

Email MCP server for Claude, Cursor, and Cline (2026)

A walkthrough of Bavimail's MCP server (v1.0, 12 tools) including setup for Claude Desktop, Cursor, and Cline, plus the prompt-injection-safe inbound-content wrapper.

How to give an AI agent its own email inbox

What an AI agent needs from an email inbox (persistence, two-way send and receive, programmatic provisioning) and how to wire one up in under 5 minutes with Bavimail.

Inbound email webhook tutorial: Node and Python (2026)

A working tutorial for receiving and parsing inbound email via webhook in Node and Python. Covers signature verification, attachment handling, and reply threading.

SPF, DKIM, DMARC setup for transactional email (2026 guide)

The 2026 setup guide for SPF, DKIM, DMARC, and MAIL FROM on a transactional sending domain. Includes the Gmail and Yahoo bulk-sender enforcement timeline and a programmatic verification path.

AgentMail vs Bavimail

AgentMail and Bavimail both ship first-party MCP servers, dedicated framework toolkit packages (@bavimail/toolkit + bavimail-toolkit on the Bavimail side, agentmail-toolkit on the AgentMail side), per-agent inbox primitives, and two-way email APIs for AI agents. Bavimail covers the same use case at one-quarter the monthly cost ($5/mo Pro vs $20/mo Developer at 10K emails), bundles transactional and marketing send on the same plan, and propagates an untrusted-third-party-content envelope on inbound tool responses for prompt-injection safety.

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