Thanks a lot!
If standard mail is set "disable", nothing is sent, and if standard mail is set to "enable", only standard mail is sent, so maybe there should another option "Send Welcome email template", I don't know.
Also another thing I should notice, when you change the settings on standard mail (change to enabled or disabled) the whole welcome email template disapears and shows an empty page. That's really annoying.
Thanks for your hard work,
Catalina.