Phpmail and mailinblack

[dede441]

Hi,
Since some months i user Phpmailer to send all my company emails to replace Outlook.
All is ok ... apparently, but we never get anti-spam/mailinblack verification email.
btw if we send the same mail with Outlook, we get back mailinblack verification email.

Emails are send via a domain with valid SPF/DKIM.
I verify my configuration and all seems ok.

That's a part of my header code to see if you've got an idea:

$mail = new PHPMailer\PHPMailer\PHPMailer;
$mail->setLanguage('fr');
$mail->IsSMTP();
$mail->Timeout=5;
$mail->Host = $compte["HOST"];
$mail->Port = $compte["PORT_OUT"];
$mail->SMTPAuth = true;
$mail->XMailer = " ";
$mail->Username = $compte["LOGIN"];
$mail->Password = $compte["PASS"];
if(isset($compte["DKIM_DOMAIN"])) {
$mail->DKIM_domain = $compte["DKIM_DOMAIN"];
$mail->DKIM_private = $compte["DKIM_PRIVATE"];
$mail->DKIM_selector = $compte["DKIM_SELECTOR"];
$mail->DKIM_passphrase = $compte["DKIM_PASSPHRASE"];
$mail->DKIM_identity = $compte["DKIM_IDENTITY"];
}
$mail->IsHTML(true);
$mail->CharSet = "UTF-8";
$mail->Encoding = "base64";

$mail->setFrom($deMail,$de);
$mail->addReplyTo($deMail, $de);
$mail->Sender = $deMail;
$mail->addCustomHeader("Sender",$de . " <" . $deMail . ">");
$mail->addCustomHeader("List-Unsubscribe","<mailto:" . $deMail . ">");
....

There's something more to do ?

[Synchro]

I can't tell from the code. Look at the headers of received messages and compare them. I don't know mailinblack, but I would hope they give you some feedback on why they act as they do, probably in extra headers.

[dede441]

In fact, if i send the same mail:

• From my hosting company (OVH), even if use the php mail() function, there's any issue. I received the anti-spam verificaition mail.
• From my local server (Turnkey 13 - i know it's not uptodate) with phpmailer and sendmail configure, i didn't received the anti-spam verification mail.
  It's seems to be a server configuration issue no ?

[Synchro]

I'd say it's a mail server configuration issue. Are you sure your messages are being sent at all? Check your mail server logs to see what is happening to them.

[dede441]

I've just compare the two mail (the one who get reply from mailinblack - and the other one) and i noticed that "mine" (the one who didn't get a reply) has a "Message-ID" generated by phpmailer but not with a real qualified name (ex: @linux) as RFC said.

The mail who works has a "Message-ID" like "[email protected]".

Can it be a way ?

[Synchro]

The message IDs that PHPMailer generates are RFC compliant, however, you can always override it and set your own to see if that helps. Simply:

$mail->MessageID = "[email protected]";

though of course you are then responsible for ensuring it's unique for every message.