[smtp] Gmail: 530 5.5.1 Authentication Required. Learn more at

You need turn on the POP mail and IMAP mail feature in setting of the email you are using to send mail. Good luck!

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Getting error while sending email through Gmail SMTP - "Please log in via your web browser and then try again. 534-5.7.14" Gmail: 530 5.5.1 Authentication Required. Learn more at Login credentials not working with Gmail SMTP How to send email using simple SMTP commands via Gmail? Sending emails through SMTP with PHPMailer How to resolve javax.mail.AuthenticationFailedException issue?