Description of problem:

You cannot configure login config for custom-mail server configuration.
This results in not beeing able to connect custom-mail server if it uses authentication

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
 <mail-session jndi-name="java:jboss/mail/Custom">
                <custom-server name="smtp" outbound-socket-binding-ref="mail-smtp-tls">
<login name="user at gmail.com" password="password"/>
<property name="host" value="smtp.gmail.com" />
<property name="port" value="587" />
<property name="starttls.enable" value="true" />
</smtp-server>
            </mail-session>
  
Actual results:
failed to parse xml configuration / login not working

Expected results:
i can send mail

Additional info: