MailSink blog. Email testing, AI agents, MCP, and developer tools.https://mailsink.dev/en-ushttps://mailsink.dev/blog/test-email-verification-github-actions/https://mailsink.dev/blog/test-email-verification-github-actions/GitHub Actions runners have no mailbox, so OTP and magic-link steps get stubbed or skipped. Give a CI job a real disposable inbox from an API, poll for the code, and assert it end to end. Three REST calls, no SMTP.Wed, 22 Jul 2026 00:00:00 GMThttps://mailsink.dev/blog/test-email-verification-jest/https://mailsink.dev/blog/test-email-verification-jest/Mocking nodemailer proves your code calls the mailer, not that a user gets a working code. Here's how to receive a real verification email inside a Jest test with a disposable inbox API, plus the timeout gotcha that makes these tests flaky.Wed, 22 Jul 2026 00:00:00 GMThttps://mailsink.dev/blog/test-email-verification-pytest/https://mailsink.dev/blog/test-email-verification-pytest/Email confirmation is one of the most reliably broken flows in a pytest suite. Here's how to receive a real OTP inside pytest using requests and a disposable inbox API, with a fixture that hands each test its own inbox. No SMTP, no IMAP.Wed, 22 Jul 2026 00:00:00 GMThttps://mailsink.dev/blog/mailsink-vs-agentmail/https://mailsink.dev/blog/mailsink-vs-agentmail/Both give AI agents email. AgentMail inboxes stick around. MailSink inboxes auto-expire. Which model fits your agent workflow? Side-by-side on identity, MCP, pricing, and use cases. Updated May 2026.Sat, 16 May 2026 00:00:00 GMThttps://mailsink.dev/blog/mailsink-vs-throwawaymail/https://mailsink.dev/blog/mailsink-vs-throwawaymail/Both serve disposable email for AI agents. ThrowawayMail is zero-friction with no auth. MailSink trades a signup for longer TTL, persistence, and per-account quotas. Pick by your workflow shape.Sat, 16 May 2026 00:00:00 GMThttps://mailsink.dev/blog/mailsink-vs-mailosaur/https://mailsink.dev/blog/mailsink-vs-mailosaur/Mailosaur Personal is $20/mo billed annually ($240/year). MailSink Pro is $15/mo, no contract, free 50 inboxes/month tier. Compared on API, SMS, and MCP.Fri, 15 May 2026 00:00:00 GMThttps://mailsink.dev/blog/claude-code-receive-email/https://mailsink.dev/blog/claude-code-receive-email/Wire MailSink's MCP server into Claude Code so the agent provisions inboxes, waits for verification mail, and pulls the OTP - without IMAP polling or Gmail OAuth. Full setup in 4 minutes.Fri, 01 May 2026 00:00:00 GMThttps://mailsink.dev/blog/test-email-verification-cypress/https://mailsink.dev/blog/test-email-verification-cypress/Stop stubbing signup flows. Provision a real inbox in a Cypress command, wait for the verification code, assert, tear down. Full cypress/commands.ts + example test.Thu, 30 Apr 2026 00:00:00 GMThttps://mailsink.dev/blog/verify-otp-playwright-without-regex/https://mailsink.dev/blog/verify-otp-playwright-without-regex/Sign up, wait for the email, grab the OTP in three API calls inside your Playwright test. No regex parsing, no Gmail IMAP, no page-polling hacks. Full fixture + CI pattern.Wed, 29 Apr 2026 00:00:00 GMThttps://mailsink.dev/blog/mailsink-vs-mailslurp/https://mailsink.dev/blog/mailsink-vs-mailslurp/At 33,000 inboxes a month MailSlurp needs its $149/mo plan; MailSink Team covers 20,000 for $49. Side by side on API, webhooks, BYOD, and MCP.Tue, 28 Apr 2026 00:00:00 GMThttps://mailsink.dev/blog/test-stripe-checkout-email-verification/https://mailsink.dev/blog/test-stripe-checkout-email-verification/End-to-end Stripe Checkout testing in CI: provision a real disposable inbox, complete payment, wait for the receipt + verification email, assert. Full Playwright + Stripe test mode setup.Mon, 27 Apr 2026 00:00:00 GMThttps://mailsink.dev/blog/mailsink-vs-mailtrap/https://mailsink.dev/blog/mailsink-vs-mailtrap/Mailtrap captures outbound mail so you can preview it. MailSink gives tests a real inbox that receives it. Compared on API, retention, pricing, and CI.Tue, 21 Apr 2026 00:00:00 GMThttps://mailsink.dev/blog/mcp-email-server-for-agents/https://mailsink.dev/blog/mcp-email-server-for-agents/Give your AI agent a real temp inbox. MailSink's MCP server provisions disposable emails, catches OTPs, and returns content in two tool calls. No SDK, no IMAP.Tue, 21 Apr 2026 00:00:00 GMT