Check Gmail SMTP Authentication
To test username and password authentication with Google SMTP server.
openssl s_client -starttls smtp -connect smtp.gmail.com:587 -crlf -ign_eof
ehlo smtp.gmail.com
auth login
<base64 encoded username>
<base64 encoded password>Written by James Cryer
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Account takeover often starts in the browser, on the login page itself. A malicious script can read credentials, tokens, or one-time codes as the person types them.
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