*@comcast.net 地址的電子郵件身份驗證

Question

我向許多客戶發送電子郵件。 出於某種原因，所有 12 個擁有 *@comcast.net 地址的客戶都將電子郵件放入他們的垃圾郵件文件夾。 我嘗試聯系康卡斯特，但試圖從他們那里獲得幫助就像從岩石中取水一樣。 這是我用來發送電子郵件的 php 腳本：

function mailerExpressBlueHostUpdated(array $mailInputs){
   
   require_once '../includes/phpmailer6.6/src/PHPMailer.php';
   require_once '../includes/phpmailer6.6/src/SMTP.php';

   $mail = new PHPMailer();
   $mail->IsMail();   
   $mail->SetFrom('skipper@sailwbob.com');
   $mail->IsHTML(true);

   $mail->addAddress($mailInputs['addAddress']);
   
   $mail->AddEmbeddedImage("../public/img/swb.jpg",      "swb-image");
   $mail->AddEmbeddedImage("../public/img/email-32.png", "swb-email");
   $mail->AddEmbeddedImage("../public/img/phone-32.png", "swb-phone"); 
   
   $body = $mailInputs['body'] ;
   $mail->isHTML(true);
   $mail->Subject = $mailInputs['subject'] ;
   $mail->Body    = $body; 

   if(!$mail->send()) {
       //echo "MAIL NOT SENT";
      return 'Message could not be sent.' . 'Mailer Error: ' . $mail->ErrorInfo;
   }else{
       //echo "sent mail";
      return 'Message has been sent';
   }   

   $mail->ClearAddresses();
}

這是我從 dns 健康檢查中得到的警告

DMARC   sailwbob.com    DNS DMARC RUA / RUF domains Not valid.
DMARC   sailwbob.com    DMARC Quarantine/Reject policy Not enabled.
SMTP    mail.sailwbob.com.  10.84 seconds - Bad on Transaction time.
SMTP    mail.sailwbob.com.  Reverse DNS does not match SMTP Banner.
DNS     sailwbob.com    SOA Expire Value is out of recommended range.
DNS     sailwbob.com    SOA Refresh Value is out of recommended range.

非常感謝任何指導

Answer 1

因此，在與 comcast 的高級技術人員進行廣泛合作后，我得到了以下信息：

Comcast has very strong security policies in place to prevent data breaches.  In 
order for emails to not go to spam you need to go to connect.xfinity.com log into 
your comcast account and add a custom filter.  Add the address you want to 
receive emails from and tell it to place those emails in your inbox.

有一個不涉及自定義過濾器的解決方案會很好，但這就是我目前所擁有的