Some Web hosting providers do not allow or enable the sending of emails through their servers. The reasons for this may vary but if they have disabled the sending of mail you will need to use an alternative method that uses a third party to send those emails for you.
An email to their technical support (after a trip to their online support or FAQ) should clarify if email capabilities are available on your server.
my question is, infinityfree hosting support sending email from contact forms?
i have tested bigboss@foropr.com from the hosting mail service, i receive messages from other email provider but, when i try to send message from from my contact from, it does not work, it looks like the server is not allowed to send email using contact forms. php