It looks like you either need to install a mail server or use SMTP.
The easiest thing might be to just set the MODX SMTP system settings to use a free account at Gmail.
These settings should work with Gmail:
SMTP Authentication: Yes
SMTP Connection Prefix: tls
SMTP Hosts: smtp.gmail.com
SMTP Password: yourGmailPassword
SMTP Port: 465
SMTP User: yourGmailUsername
Use SMTP: Yes
If all you want is a simple contact form, you could just install SPForm. Since the SMTP settings are working, SPForm should work as soon as it's installed, but if you already have a resource called "contact" or "Thank you", change the pagetitle and alias before installing SPForm so it won't get confused.
I preferi formit ... I'd like to have a solution that I can use with many features....
what about this:
I've this problem:
I've a chunk... to create in Chunk area
I've a form ... to insert in my HTML page
... but where I've to insert insert this snippet?:
FormIt?
&hooks=`recaptcha,spam,email,redirect`
&emailTpl=`MyEmailChunk`.....
in snippet area or in HTML page where I've inserted HTML form?
The FormIt snippet tag goes on the same page as the HTML form (above the form).