Confirmation email message always goes to spam

Hi, please read the following troubleshooting tips.

Thank you

This interesting tutorial is about mail that comes from the post to the site manager (to get info that people insert in the form).
My problem is about ‘confirmation email’, the courtesy email that who filled the form receive (for example: thanks for contacting us etc). This email go alway directly to spam folder.

Thi is the problem I should solve.

Thanks

Thank you for reporting back. What kind of e-mails are you testing or having issues with? Are they Gmail, Hotmail, Yahoo or domain name e-mails?

No, is with all kind of email account.
I tested with gmail, hotmail, and my personal email that is a domain name account.

Which software are you using to read your e-mails?