Dev tools · alternatives · 2026
24 alternatives to A fake SMTP server for software integration testing
This is a side project of mine. Use this as your SMTP server in a test environment to guarantee that your users don't receive test emails. Looking for feedback, especially on the security side.
A fake SMTP server designed for testing software in development environments. It captures outgoing emails without sending them to real addresses, preventing test messages from reaching actual users. Developers can… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. A fake SMTP server for software integration testing launched in 2024; newer entries below may have overtaken it.
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2017 · develmail.com · its alternatives →
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MailSnag▲83Automated email testing for dev/staging/QA/CI environments
2018 · mailsnag.com · its alternatives →
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SMTP‑Test.com▲103One‑click SMTP server test with real‑time protocol logs
2025 · smtp-test.com · its alternatives →
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Mailtrap.io▲125Fake SMTP. Send Test Emails without spamming real customers
2014 · mailtrap.io · its alternatives →
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Hi HN, Two months ago, we launched MailFrom.dev, a fake SMTP server for developers who want to test email sending without hitting real inboxes – think of it like a simpler, cheaper alternative to Mailtrap or Mailhog with a focus on ease of use. Since then: - We’ve had 55 developers sign up with 4 paid subscription active and 821 test emails sent - Improved stability, speed, and small features our early users needed - Worked hard to add roles (wich will be released later next week) What's improved: - Better UI to inspect headers, bodies, and attachments - Faster inbox refresh and sync between…
2025 · mailfrom.dev · its alternatives →
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SMTP Debug Tool▲346Test and debug your SMTP connection, quickly and for free
2023 · smtpdebug.com · its alternatives →
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The first free and accurate email verification service
2020 · gmass.co · its alternatives →
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MailCue▲82Run as a fully hardened production email server.
Apr 2026 · olib-ai.github.io · its alternatives →
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The collaborative email testing platform for modern teams
Dec 2025 · mailsandbox.com · its alternatives →
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SendPit▲2SMTP sandbox for email testing for developers and QA teams!
Feb 2026 · sendpit.com · its alternatives →
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Check & verify email server online.
2025 · smtpprovider.com · its alternatives →
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A fast SOCKS5 proxy that tunnels your traffic through what looks like normal SMTP email, bypassing Deep Packet Inspection firewalls. How it works: - Client runs a local SOCKS5 proxy (127.0.0.1:1080) - Traffic is sent to server disguised as SMTP (EHLO, STARTTLS, AUTH) - DPI sees legitimate email session, not a VPN/proxy Features: - One-liner install on any Linux VPS - Multi-user with per-user secrets and IP whitelists - Auto-generated client packages (just double-click to run) - Auto-reconnect on connection loss - Works with any app that supports SOCKS5 Tech: Python/asyncio, TLS…
Jan 2026 · github.com · its alternatives →
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I built Sniffmail because I was tired of fake and disposable emails getting through signup forms on every project I shipped. It verifies email addresses at the SMTP level without sending an email. One API call returns whether the mailbox exists, is disposable, has a full inbox, or is a catch-all domain. Install with npm install sniffmail, call validateEmail("[email protected]"), get a verdict. REST API available for non-Node stacks. What it checks: SMTP mailbox existence (connects to the mail server, confirms the address is real), disposable/temporary email detection (Mailinator, 10…
Mar 2026 · sniffmail.io · its alternatives →
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I've spent the last few months working on something I wish I'd had years ago. I kept running into the same issue: CI green, production mail broken. TLS handshake failures, DKIM alignment mismatches, SPF soft-fails ... the stuff that only surfaces when real mail servers are involved. Most test tools (Mailpit, MailHog) are catch-alls. They confirm "an email was sent" but don't validate the protocol. They also aren't designed for network-exposed environments: no auth, unprotected Web UI, easy to enumerate messages. VaultSandbox is my attempt at fixing that. It's a self-hosted SMTP gateway…
Jan 2026 · vaultsandbox.com · its alternatives →
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SMTP server & email API embed in an intuitive interface
2020 · tipimail.com · its alternatives →
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A fast and free, online way to send a test email
2022 · sendtestemail.com · its alternatives →
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Cleanmails - Unlimited email verification
Jan 2026 · its alternatives →
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Mailnest▲100Sandbox Email testing tool for IT product, service companies
2020 · mailnest.io · its alternatives →
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Mailcheap▲123Email hosting, dedicated email servers, API-first platform
2018 · mailcheap.co · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →