PHPMailer .Exception:SendAsDeniedException.MapiExceptionSendAsDenied

Question

I have installed PHPMailer on my website. But, I can\'t get it to work the way it should. When I send an email through the website, I get the following error:

Answer 1

I'd guess that the culprit is this:

$mail->FromName = trim_input($_POST['Name']);

What you're doing here is asking outlook to forge the from address by using arbitrary user input. This is generally a bad idea. The error message name suggests that this is where the problem is too: SendAsDeniedException, i.e. it doesn't like who you're sending as.

Try this instead:

$mail->From = trim_input("receivingEmailAdress@outlook.com");
$mail->FromName = trim_input($_POST['Name']);
$mail->AddAddress("receivingEmailAdress@outlook.com", "my name");
$mail->AddReplyTo(trim_input($_POST['Email']), trim_input($_POST['Name']));

This is: put your own address as the from address (so you're not forging anything), and use the submitter's address as a reply to, and also use their name alongside the from address.

This problem is covered in the PHPMailer troubleshooting guide.

Answer 2

This error can also mean another thing as it did for me. So make sure also if the $mail->From address is the same as the address you're using to authorize because otherwise you'll see this error:

554 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied;
Failed to process message due to a permanent exception with message Cannot submit message.

Answer 3

I solved by change

 $mail->setFrom('test@hostinger-tutorials.com', 'Your Name');

To be the same $mail->Username

 $mail->Username = 'example@hotmail.com';

to be like that :

$mail->setFrom('example@hotmail.com', 'Your Name');

Answer 4

Office 365 requires the "<" and ">" characters since September 1st, 2018.

This can often be fixed by updating the settings on the device or printer by adding angle brackets ("<" and ">") around the Reply or Mail From address.

See Microsoft's support for details.