Hi

First of all, My english language is poor! sorry

I upgraded the mantis from 1.2 to 1.3, but the mail sender is not working. I use SMTP server the office 365 and It worked so far.

Please help me.

error message ($g_log_destination = 'file:/tmp/mantisbt.log';):
CEST MAIL email_api.php:1385 email_send() ERROR: Message could not be sent - SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: 5.7.60 SMTP; Client does not have permissions to send as this sender [XXXXXXXX.prod.outlook.com]

config_inc.php

$g_enable_email_notification = ON;
$g_phpMailer_method = PHPMAILER_METHOD_SMTP;
$g_from_email= 'mantis@company.com';
$g_smtp_host = 'smtp.office365.com';
$g_smtp_port = 587;
$g_smtp_username = 'mantis@company.com';
$g_smtp_password = 'password';
$g_smtp_connection_mode = 'TLS';

I do not have any more ideas :(