Test your SMTP server connection and validate email sending credentials. Ensure your mail server is properly configured before sending campaigns.
Enter your SMTP server details to test the connection. Your credentials are not stored.
Your credentials are never stored and are only used for the connection test. All data is transmitted securely.
Port 587 with STARTTLS is recommended for most servers. Port 465 uses SSL/TLS from the start.
Gmail, Outlook, and Yahoo require app-specific passwords or OAuth. Check your provider's documentation.
Quick reference for popular email providers
Host: smtp.gmail.com
Port: 587 (TLS) or 465 (SSL)
Note: Requires app password
Host: smtp.office365.com
Port: 587 (STARTTLS)
Note: Use full email as username
Host: smtp.mail.yahoo.com
Port: 587 or 465
Note: Requires app password
Host: smtp.sendgrid.net
Port: 587 or 465
Username: apikey
DitLead helps you manage unlimited SMTP connections, automate warmup, and send thousands of emails with perfect deliverability.