envoyer un e-mail sur php

Question

Le courrier électronique fonctionne correctement, mais une erreur d'expéditeur inconnue s'affiche sur Gmail après l'envoi du message. Mon code PHP est le suivant:

$sendto="testconcepttc@gmail.com"; 
$subject = "Payment details of ".$dmail['name']; 

$message = "<br><br>"; 

$message .= '<table border="0" cellspacing="5" cellpadding="4" width="600"style="border-collapse:collapse; font-family:Lucida Sans; border-color:#CCCCCC"> 

      <tr style="background-color:#023564; color:#FFF;"> 
      <td colspan="2"><h3 align="center">Registration Information From Midterm Delhi CSI 2017</h3></td> 
     </tr> 
      <tr> 
        <td width="54%"><p>Name</p></td> 
        <td width="46%"><p>'.$dmail['name'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Age</p></td> 
        <td width="46%"><p>'.$dmail['age'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Institution</p></td> 
        <td width="46%"><p>'.$ucomp.'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Designation</p></td> 
        <td width="46%"><p>'.$dmail['designation'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Postal Address</p></td> 
        <td width="46%"><p>'.$dmail['address'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>City</p></td> 
        <td width="46%"><p>'.$dmail['city'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>State</p></td> 
        <td width="46%"><p>'.$dmail['state'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Pin</p></td> 
        <td width="46%"><p>'.$dmail['pin'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Country</p></td> 
        <td width="46%"><p>'.$dmail['country'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Phone (Off).</p></td> 
        <td width="46%"><p>'.$dmail['phone_off'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Phone (Res).</p></td> 
        <td width="46%"><p>'.$dmail['phone_res'].'</p></td> 
       </tr> 
        <tr> 
        <td width="54%"><p>Mobile No</p></td> 
        <td width="46%"><p>'.$dmail['phone'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>E-mail</p></td> 
        <td width="46%"><p>'.$email.'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Gender</p></td> 
        <td width="46%"><p>'.$dmail['gender'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>Food Preference</p></td> 
        <td width="46%"><p>'.$dmail['dite'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>CSI Number</p></td> 
        <td width="46%"><p>'.$dmail['ioa_membership_no'].'</p></td> 
       </tr> 
       <tr> 
        <td width="54%"><p>MCI Number</p></td> 
        <td width="46%"><p>'.$csi.'</p></td> 
       </tr> 

        </table>'; 


    $username=$dmail['name']; 
    $header = "MIME-Version: 1.0\r\n"; 
    $header .= "Content-type: text/html\r\n"; 
    $header .= "From: ".$username."\r\n"; 
    $header .="\r\n"; 

    $retval = mail ($sendto,$subject,$message,$header); 
    return $retval; 

Answer 1

Essayez d'ajouter l'en-tête Reply-To.

$header .= 'From: from@email.com' . "\r\n"; 
$header .= 'Reply-To: from@email.com' . "\r\n"; 

OU avec le nom:

$header .= 'From: "From Name" <from@email.com>' . "\r\n";  
$header .= 'Reply-To: "From Name" <from@email.com>' . "\r\n";