Reports server mail distribution with Office 365

I have a problem with sending emails using Office 365.

In rwserver.conf, I have this:
<pluginParam name="mailServer" value="smtp.office365.com:587">
<property name="mail.smtp.starttls.enable" value="true"/>
<property name="mail.smtp.starttls.required" value="true"/>
</pluginParam>

But when sending mails in log upper values are not picked up by the reports server:
mail.smtp.host = smtp.office365.com
mail.smtp.port = 587
mail.smtp.auth = null
mail.smtp.auth.login.disable = null
mail.smtp.ssl.trust = null
mail.smtp.starttls.enable = null
mail.smtp.starttls.required = null
mail.transport.protocol = null
mail.smtp.ssl.protocols = null

Any ideas?