Gmail IMAP php邮件作为电子邮件的回复发送

Question

I want to send an email as reply in gmail through my Laravel CRM system.

My code is as below:

$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$headers .= 'From: '.Auth::user()->f_name.' '.Auth::user()->l_name.'<'.$gmail_address.'>'." \r\n" .
                        'Reply-To:  <'.$gmail_address.'>'. "\r\n" .
                        'Subject: '.$subject."\r\n".
                       'To: '.$to."\r\n".
                        'In-Reply-To:  <56F15324.7050704@xxxx.xxx>'. "\r\n" .
                        'References: <56F15324.7050704@xxxx.xxx>'. "\r\n" .
                        'X-Mailer: PHP/' . phpversion();

imap_mail ( $to , $subject ,$body,$headers);

But it sends it as a new email, ie not as a reply.

Ideally it should add "Re: " to subject and append the actual email at the end of reply email body.

Any Help please..

Answer 1

Your In-Reply-To and References headers are hardcoded to some magic value; that's probably not what you want to do.

Here is how I would improve the code:

• Use a library which handles the rather low level bits of RFC2047, RFC2231 and especially RFC 5322 for you. It's very likely that any non-ascii characters in your user's l_name produce a non-compliant message. Read the whole RFC5322 to understand how e-mails work. Read about various encodings which come into play.
• Track the Message-Id of the message(s) that you're replying to, and set your own In-Reply-To & References headers accordingly.