SMTP‑Test.com

What it does

Test any outgoing email setup—like Gmail, Outlook, SES—in seconds, no signup required. Just enter your server details and see what’s working and what’s not in clear, live feedback. Fix login, security or connection issues fast—no technical expertise needed.

Test SMTP server connections and debug email delivery issues. Supports Gmail, Office 365, Amazon SES, and custom SMTP servers with real-time monitoring.

Free online SMTP tester to verify SMTP connections, test mail servers, and diagnose email delivery issues. Perfect for Gmail, Office 365, SendGrid, and custom SMTP servers. Our SMTP test utility helps verify email server configurations before deploying to production. Whether you need to test SMTP connections, check SMTP server settings, or validate your SMTP relay setup, this tool provides comprehensive diagnostics for your email infrastructure. Using an SMTP checker regularly helps maintain email system reliability. Our SMTP testing tool provides real-time diagnostics, helping identify common issues like authentication failures, connection timeouts, or relay access problems. Whether you're…from smtp-test.com

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  A fake SMTP server for software integration testing2024 · fakemail.stream · ▲127

  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.

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  Send Test Email2022 · sendtestemail.com · ▲80

  A fast and free, online way to send a test email

• FS
  Fake SMTP server as a service2017 · develmail.com · ▲149
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  SMTP Debug Tool2023 · smtpdebug.com · ▲346

  Test and debug your SMTP connection, quickly and for free

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  Free SMTP Server Test Tool2025 · smtpprovider.com · ▲2

  Check & verify email server online.

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  MailSnag2018 · mailsnag.com · ▲83

  Automated email testing for dev/staging/QA/CI environments

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  /dev/null▲472

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

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  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

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  Clueso▲1,300

  Create stunning product videos in minutes with AI

  AI · 2025 · clueso.io

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  Trickle - Magic Canvas ▲1,064

  Hey HN! Introducing Trickle Magic Canvas: the world’s first Agentic Canvas, where you can visually co-create apps and websites with AI, from idea to production. Why is a canvas better? Most AI tools today rely on linear chats or text prompts. We believe that limits creativity and clarity. Canvas changes the game. 1. Every version & page at a glance. Each page and sub-page lives on a timeline. You can quickly browse, edit, and preview progress like a living, visual document — no more digging through chat logs or scattered states. 2. The canvas is the context. Unlike linear chats, you can…

  AI · 2025 · trickle.so

• TB
  Tinder but it's only pictures of my wife and I can only swipe right▲1,030

  Life & fun · 2025 · trytender.app

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  Ten years of running every day, visualized▲958

  Today marks ten years, 3653 consecutive days, of running at least one mile every day under the USRSA rules [1]. To celebrate, I built an interactive dashboard that turns a decade of GPX files into charts you can explore. Running has truly changed my life: I've made lifelong friends, explored beautiful places, and more importantly invested into my own health and fitness, which I'm starting to see the positive benefits as I get older. The stack is pretty simple: a NextJS app, with a Postgres database to keep all my running data, and all the stats are pre-computed and cached in Redis, so I…

  Dev tools · 2025 · nodaysoff.run

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  Draw a fish and watch it swim with the others▲935

  Made this website as an exercise in vibe-coding and GCP. It was posted about a few times around the internet, on sites like Morning Brew (https://www.morningbrew.com/issues/business-buzzkill), MetaFilter (https://www.metafilter.com/209703/Draw-A-Fish), boingboing.net, etc. I think it's cute! I built a basic CNN trained against penises and swastikas, and then anything that doesn't hit the 63% confidence score gets sent to a mod queue, a vibe-coded fish-tinder…

  AI · 2025 · drawafish.com

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  Use Their ID – Use your local UK MP’s ID for the Online Safety Act▲862

  Hi HN - I made a site that takes a UK postcode, grabs the local MP's information and generates an AI mockup of what their ID might look like. It's a small, silly protest at the stupidity of the Online Safety Act that just came into force. edit - My open AI credits got hugged to death, please use a known postcode (like one from Kier Starmer's constituency, WC2B6NH) in the meantime.

  AI · 2025 · use-their-id.com