How to specify from on the fly in laravel 8 mail::send - laravel

Question

From the contact form on my website, I send an confirmation email to the visitor and an email to the website admin. Both email are coming to the email address defined in .env.
How can I change the from field for the email sent to admin?
My current code where the second Mail:: gives an error.
// send html email to user
Mail::to(request('email'))
->send(new ContactWebsite($emailFields));
// send html email to admin
Mail::to("newemail#address")
->from(request('email'))
->send(new ContactWebsite($emailFields));
Daniel solution is good but how do I implement it in my case?
In the Contact Contoller store function, I put the fromAddress in the $emailFields object:
$emailFields = (object) [
'fromName' => $fullnameUser,
'fromEmail' => request('email'),
'fromAddress' => $fullnameUser.' <'.request('email').'>',
'subject' => '...',
'body' => request('body')
];
Then in the Mailable:
public function __construct($emailFields) {
$this->emailFields = $emailFields;
$this->fromAddress = $emailAddress['fromAddress'];
}
public function build() {
return $this->markdown('emails.contact-confirm-user');
}
Is the syntax correct in the __construct function?
And how do I pass the $this->fromAddress in the build function?

Answer 1

You are supposed to define the ->from() part in your Mailable class's build() function (in your case ContactWebsite) either as part of the $emailFields, or as a second parameter. Then you just use it in the build function:
class ContactWebsite extends Mailable
{
use Queueable, SerializesModels;
private $fromAddress = 'default#value.com';
public function __construct($emailFields, $fromAddress = null)
{
if ($fromAddress) {
$this->fromAddress = $fromAddress;
}
}
public function build()
{
return $this->from($this->fromAddress)
// Whatever you want here
->send()
}
}