Drupal "Unable to send e-mail. Contact the site administrator if the problem persists."

Hi Everytime somone try’s to sign up to my site I get this error message

“Unable to send e-mail. Contact the site administrator if the problem persists.”

Many Thanks for your help

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For me the problem was that sendmail wasn’t installed on the VPS.

I’ve now seen this using both the LEMP one click install and the Drupal 8 one click install.

Do you configure email server for send email from php scripts ? <br> <br>If no - need configure email server. <br> <br>Easy way - Configure Drupal send email from gmail <br> <br> <br> <br> <br>