SMTP Connection Tester

Test your SMTP server configuration by verifying connection, authentication, and optionally sending a test email.

Common ports: 25 (unencrypted), 465 (SSL/TLS), 587 (STARTTLS)

SMTP authentication username (often your email address)

Display name shown in the "From" field (e.g., "My App")

The "From" address for test emails. Defaults to username if empty.

If provided, a test email will be sent to this address

Common SMTP Settings

Gmail

Host:
smtp.gmail.com
Ports:
465 (SSL) / 587 (TLS)

Requires App Password

Outlook/Office 365

Host:
smtp.office365.com
Ports:
587 (TLS)

Use your email as username

Yahoo Mail

Host:
smtp.mail.yahoo.com
Ports:
465 (SSL) / 587 (TLS)

Requires App Password

SendGrid

Host:
smtp.sendgrid.net
Ports:
465 (SSL) / 587 (TLS)

Use 'apikey' as username