ALLOW SENDER HEADER not working

[pradeepnarayan888]

Hi,
I am trying to use the feature ALLOW SENDER HEADER - If enabled, outgoing messages can use any address in the From header as long as a Sender header is included with an authorized address.

I am using a PHPmailer script to send mail.

Below code works
$mail = new PHPMailer(true);
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'postal.campaignposts.info'; // Specify main and backup server
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = '*****'; // SMTP username
$mail->Password = '**********'; // SMTP password
$mail->Port = 25;
$mail->setFrom('user@campaignposts.info', 'John');

But if i want to send as a different user using below code, it gives error 'SMTP Error - 530 From/Sender name is not valid.'

$mail = new PHPMailer(true);
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'postal.campaignposts.info'; // Specify main and backup server
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = '*****'; // SMTP username
$mail->Password = '**********'; // SMTP password
$mail->Port = 25;
$mail->Sender = 'user@campaignposts.info';
$mail->setFrom('john.879@gmail.com', 'John');

Can someone help me solve this.

[rccess]

Add the sender domain in postal domain add,

no matter records verified or not this error will not come out , your email will send

But for better delivery dkim , spf records should be pass

[willpower232]

Have a look at PHPMailer/PHPMailer#1250

It seems you may need to use $mail->addCustomHeader to set the sender header as well as using the direct method you are currently.