swaks

SMTP command-line test tool for sending test emails and debugging

brewmacoslinux

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SMTP command-line test tool

swaks

Send a test email to a recipient via localhost SMTP$ swaks --to user@example.com --from sender@example.com --server localhost

Send email with custom subject and body to specific SMTP server

$ swaks --to user@example.com --from sender@example.com --server mail.example.com --h-Subject 'Test' --body 'Hello World'

Test SMTP authentication with credentials

$ swaks --to user@example.com --from sender@example.com --server smtp.gmail.com:587 --auth LOGIN --auth-user username --auth-password password --tls