Free SMTP Tester - Test Your Mail Server Connection

Free SMTP tester to check your mail server connection. Test SMTP authentication, verify email settings, and troubleshoot server issues instantly.

Only test SMTP servers and accounts that you own or are explicitly authorized to use. 
Prefer a secure test without SMTP credentials? Try our Email Delivery Test instead

Gmail
Outlook / Office 365
Yahoo Mail
SendGrid
Mailgun
Amazon SES
Brevo
MailerSend
Zoho Mail
iCloud Mail
Mailjet
Postmark
Custom

Credentials are used only to perform this test and are not stored. Use temporary or test credentials whenever possible.

We only test connectivity. No credentials or emails are stored
99.9% Accurate
Instant Results
Upto 10 free trials

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No registration. Instant results. Sign up for more trials

Start Testing Your SMTP Server Now

Ready to verify your SMTP server configuration? Use our free SMTP tester to check server connectivity, test authentication, and ensure reliable email delivery in seconds.