Take control of your email-sending reliability with the SMTP Debug Tool, a professional-grade yet free solution for diagnosing SMTP connection problems. This tool tests your connection with email services such as Amazon SES, SendGrid, and Sendinblue by sending a sample email and recording the entire server communication log. Use this log to investigate and resolve any issues in your SMTP setup. Designed with user safety as a priority, the tool encrypts all connections, does not retain session data, and offers the option to test without credentials using the “SMTP Blackhole” feature. Rest assured your email testing is as secure as it is effective.