With our free SMTP testing tool you can quickly check & diagnose any of your SMTP connections such as Webmail, Gmail, SendGrid, Amazon SES, SparkPost, ElasticEmail, PowerMTA, Postfix and many more. Our tool doesn't save your SMTP credentials in any format over our servers, so it's 100% secure.

Find Errors Quickly | 100% Safe - No Data Storage | Ready-to-use
Use Predefined Hosts: Gmail, SendGrid

SMTP


Sender/Recipient



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