phpmailer - The following SMTP Error: Data not accepted
Interestingly, I had the same exact issue and for me the problem was that my connection was timing out. To be able to see more details on my connections, I added $mail->SMTPDebug = 4;
to my phpmailer (look up how to capture the debug since the default output function is echo).
Here's the result:
SMTP -> get_lines(): $data was ""
SMTP -> get_lines(): $str is ""
SMTP -> get_lines(): $data is ""
SMTP -> get_lines(): timed-out (10 seconds)
SMTP -> FROM SERVER:
SMTP -> ERROR: DATA not accepted from server:
The default timeout is set to 10 seconds. If your app can support more, add this line to your phpmailer:
$mail->Timeout = 20;
set phpmailer to work in debug to see the "real" error behind the generic message 'SMTP Error: data not accepted' in our case the text in the message was triggering the smtp server spam filter.
$email->SMTPDebug = true;
For AWS users who work with Amazon SES in conjunction with PHPMailer, this error also appears when your "from" mail sender isn't a verified sender.
To add a verified sender:
Log in to your Amazon AWS console: https://console.aws.amazon.com
Select "Amazon SES" from your list of available AWS applications
Select, under "Verified Senders", the "Email Addresses" --> "Verify a new email address"
Navigate to that new sender's email, click the confirmation e-mail's link.
And you're all set.
your server dosen't allow different sender and username
you should config: $mail->From
like $mail->Username