sendmail 발송 에러
2020년 7월 10일 금요일
550-5.7.1 [xx.xxx.xx.xx] The IP you're using to send mail is not authorized to 550-5.7.1 send email directly to our servers. Please use the SMTP relay at your 550-5.7.1 service provider instead. Learn more at 550 5.7.1 https://support.google.com/mail/?p=NotAuthorizedError d11si9562967pln