SMTP -> ERROR: AUTH not accepted from server: 530-5.7.0 Must issue a STARTTLS command first. For more information, go to 530-5.7.0 https://support.google.com/a/answer/3221692 and review RFC 3207 530 5.7.0 specifications. 6a1803df08f44-90cc652b60fsm2967616d6.40 - gsmtp SMTP Error: Could not authenticate. Error in sending mail