To configure SMTP so that your form can work correctly you just have to enter your Joomla:
site
global setting
server tab
email configuration
mail program: SMTP
E-mail of the sender: (mail to which the form information will arrive @ mydomain.com)
Sender's name: (optional)
Route for sendmail: (default)
SMTP authentication: YES
Security of SMTP: SSL
SMTP port: 587 or 465
SMTP user: (mail to get the form information @ mydomain.com)
SMTP password: (password of the configured email)
SMTP server: mail.midominio.com (replacing mydomain.com with the domain hosted in Conexcol)