Missing sendemail.php. file

I'm pretty sure I made the changes on this file once, but I can't locat the file anywhere and my contact form email isn't working. Getting the mesasage: Invalid address: (From): root@localhost

Okay thanks. Good to know. I'm still getting an email error message when testing on my live site.

Email could not be sent due to some Unexpected Error. Please Try Again later.

Reason:
Invalid address: (From): root@localhost

Do I need to have a MAMP testing server in order for my contact form to work? I'm getting an invalid address from root@localhost error. I have an ht.access in my remote server.

I have checked out the document forms section. My url is madhouse.graphics.
I just read on the forum that I needed to send the one-page folder to my remote - which I had not done previously. I sent it but it still doesn't work. I am using the one page template, but added a different portfolio and portfolio single pages.
While you are looking at my site... if you also happen to have a solution for making my little video be responsive without making it have a black background - I would love to know the code.

Thank you so much for the template and the help!!

Peggy

p.s. - my video does have the white background - it just isn't responsive and doesn't fit the page very well. Thanks.

https://madhouse.graphics

Thank you.

Here is how I have it filled out. Not sure what is wrong with it. Do you see something? Should I take out the no-replu address?

Thanks.

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'phpmailer/src/Exception.php';
require 'phpmailer/src/PHPMailer.php';
require 'phpmailer/src/SMTP.php';

/-------------------------------------------------
Receiver's Email
---------------------------------------------------/

$toemails = array();

$toemails[] = array(
'email' => 'admin@madhouse.graphics', // Your Email Address
'name' => 'Peggy Lowe' // Your Name
);

/-------------------------------------------------
Sender's Email
---------------------------------------------------/

$fromemail = array(
'email' => 'no-reply@admin@madhouse.graphics', // Company's Email Address (preferably currently used Domain Name)
'name' => 'Madhouse Graphics' // Company Name
);

/-------------------------------------------------
reCaptcha
---------------------------------------------------/

Thank you! I appreciate your help!

Peggy