Free SMTP ToolPoint your app at a set of throwaway credentials and send whatever you like. Every message is accepted, logged live, and dropped. Nothing reaches a real inbox.
Start a session and you get a throwaway SMTP host, username, and password. Send mail to it from your app, your CMS, or your mail client: every message is accepted, logged live, and discarded. Nothing reaches a real recipient.
A unique username and password for this session only.Plain and STARTTLS on one port, implicit SSL on another.Sessions stay active for 30 minutes, logs for an hour after.Free and instant, no signup required.
SMTP Blackhole TestingStaging servers still deliver mail, which means a wrong recipient list or a live template turns into a real mistake. A blackhole accepts everything, records everything, and forwards nothing.
FAQHow the blackhole works, where your messages end up, and how long a session stays alive.
A blackhole is a disposable SMTP server that accepts every message, records the full conversation, and delivers nothing. Point your app at it to test sending code, templates, and attachments without emailing a real person.
Start a session, copy the host, port, username, and password into your app's SMTP settings, then send mail as usual. Commands and replies stream into the page live, and each accepted message is summarised with its subject, sender, recipients, and size.
No. Every message is accepted with a 250 OK reply, logged, and discarded. There is no forwarding, no relay, and no bounce back to your sender.
Sessions stay active for 30 minutes. After that the SMTP login is refused and the countdown hits zero, but the log stays readable for another hour so you can still download the transcript. Each session holds up to 50 MB of logged traffic.
The plain port accepts unencrypted connections and STARTTLS, and the TLS port accepts implicit SSL. Use whichever matches your software's encryption setting.
Credentials are unique per session and expire with it, secrets such as AUTH lines are redacted from the log, and nothing you send is kept beyond the session's retention window. Use it freely while developing sending code.
Free, no signup required, and each tool shows you the exact response from your mail server so you can see the full details.
FeaturesEverything behind reliable delivery at any volume: sending, verification, routing, and the analytics to see what happened, from first API call to millions a month.
Send transactional and bulk emails through reliable SMTP infrastructure built for speed, security, and deliverability.
Integrate email delivery into your applications using powerful APIs built for flexibility, scalability, and performance.
Separate transactional and marketing traffic into isolated sending streams to protect reputation and keep critical emails fast.
Receive and route incoming emails directly into your applications using flexible automation and processing workflows.
Create and deliver marketing campaigns designed to increase engagement, reach, and customer retention.
Receive real-time event notifications for deliveries, opens, and clicks for storage and automation workflows.
Monitor email performance with detailed insights, reporting tools, and actionable delivery metrics in real time.
Gain greater sending control with dedicated IPs designed for consistency, reputation, scalability, and reliability.
Build integrations faster using SDKs, code examples, and resources for modern application development.
