I complete auto mail sending configuration on our Opera PMS. but the mail delivery is failed. sending error message is “receiving-gmail@gmail.com - FAILED ERROR smtp.gmail.com:25 sending-mail@gmail.com/******/smtp.gmail.com User Authentication Failed” Gmail. if we used here Microsoft 365 mail account then error is "receiving-mail@abcd.com - FAILED ERROR smtp.office365.com:25 sending-mail@gmail.com/******/smtp.office365.com User Authentication Failed”