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“Simplicity is the Ultimate Sophistication” Leonardo Da Vinci
SMTP host
 host or ip address of your smtp server (example: smtp.gmail.com)
 FYI: it seems smtp.gmail.com only allows private domain mail address (Google G Suite subscribers).
the default port is 25, but some smtp server use a custom port (example: 587)
 checked it only if the smtp server needs a secured connection (ssl, tsl)
 most of smtp servers need an authentication (login/password). Check it if required
required if 'Use authentication' is checked (ex: your_account, your_account@foo.com)
required if 'Use authentication' is checked
Email from
the sender's email address (example: your_address@gmail.com)
Email to
very important : the test mail will be sent to this address (ex: your_address@gmail.com)
We made this tool for our personal use.
If you need to test a smtp server, please feel free to use it at your own risks.

For your information, our web app does not store any information that you typed. It will just send a test mail with the parameters you have provided. No data will be stored in any form of storage on our server.

SSL will be available very soon (at the end of this month -may 2017). In fact you can already use https://www.smtper.net now.