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

Get to your Gmail account's security settings and set permissions for "Less secure apps" to Enabled. Worked for me.

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Expected response code 250 but got code "535", with message "535-5.7.8 Username and Password not accepted How to to send mail using gmail in Laravel? HTML image not showing in Gmail Gmail Error :The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required Send email from localhost running XAMMP in PHP using GMAIL mail server The server response was: 5.7.0 Must issue a STARTTLS command first. i16sm1806350pag.18 - gsmtp Gmail: 530 5.5.1 Authentication Required. Learn more at Sending mail attachment using Java Javamail Could not convert socket to TLS GMail Unable to send email using Gmail SMTP server through PHPMailer, getting error: SMTP AUTH is required for message submission on port 587. How to fix?

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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?