xingyou/app/Mail/SysErrorNotice.php

<?php

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class SysErrorNotice extends Mailable
{
    use Queueable, SerializesModels;

    public string $content = "";

    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($content)
    {
        $this->content = $content;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        $this->from("lilei@ttyuweb.com", "星优办公服务器");
        $this->subject("星优办公紧急通知");
        $this->to("597196313@qq.com");

        return $this->view('emails.server.error');
    }
}