为什么我的图片不能在html电子邮件中显示?

I have a script for sending HTML email messages which works fine for text and html tags but I cannot figure out why my images wont display.

function sendHtmlEmail($email, $content, $message_content){
    $to = "$email";
    $subject = "AeroBLOG - $content";

    $message = "
    <HTML>
    <HEAD>
        <TITLE>$subject</TITLE>
        <META http-equiv='content-type' content='text/html; charset=utf-8' />
        <STYLE>
    </HEAD>
    <BODY>
           $message_content
    </BODY>
    </HTML>
    ";

    $headers  = "MIME-Version: 1.0
";
    $headers .= "Content-type: text/html; charset: utf8
";
    $headers .= 'From: <do-not-reply@aeroblog.tk>' . "
";

    if(mail($to,$subject,$message,$headers)){return true;}else{return false;}
}

call to function:

$message="<A href=\"http://aeroblog.tk/\"><IMG src=\"http://aeroblog.tk/img/VerificationEmail.png\" alt=\"copy & paste this link into your browsers navigation bar: http://.........\" width=\"1024px\" height=\"768px\"></A>";

sendHtmlMail("myemail@example.com","Subject",$message);

Here is the complete email which is returned including headers:

Delivered-To: oneal.michaels@gmail.com
Received: by 10.182.154.35 with SMTP id vl3csp1831038obb;
        Sun, 6 Dec 2015 16:26:01 -0800 (PST)
X-Received: by 10.13.213.14 with SMTP id x14mr19939281ywd.229.1449447961510;
        Sun, 06 Dec 2015 16:26:01 -0800 (PST)
Return-Path: <a6602671@srv10.000webhost.com>
Received: from postlady.000webhost.com (smtp5.000webhost.com. [31.170.163.248])
        by mx.google.com with ESMTP id j63si14327386ywf.69.2015.12.06.16.26.01
        for <oneal.michaels@gmail.com>;
        Sun, 06 Dec 2015 16:26:01 -0800 (PST)
Received-SPF: pass (google.com: domain of a6602671@srv10.000webhost.com designates 31.170.163.248 as permitted sender) client-ip=31.170.163.248;
Authentication-Results: mx.google.com;
       spf=pass (google.com: domain of a6602671@srv10.000webhost.com designates 31.170.163.248 as permitted sender) smtp.mailfrom=a6602671@srv10.000webhost.com
Received: by postlady.000webhost.com ([000webhost.com Mail Server], from userid 99)
    id 59C5B602FC; Mon,  7 Dec 2015 00:26:01 +0000 (UTC)
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on
    postlady.000webhost.com
X-Spam-Level: ****
X-Spam-Status: No, score=4.6 required=7.0 tests=BODY_URI_ONLY,
    HTML_IMAGE_ONLY_08,HTML_IMAGE_RATIO_02,HTML_MESSAGE,HTML_SHORT_LINK_IMG_1,
    MIME_HTML_ONLY,TVD_RCVD_SPACE_BRACKET,T_RP_MATCHES_RCVD autolearn=disabled
    version=3.3.2
Received: from srv10.000webhost.com (srv10.000webhost.com [31.170.160.74])
    by postlady.000webhost.com ([000webhost.com Mail Server]) with ESMTP id 9924B602FB
    for <oneal.michaels@gmail.com>; Mon,  7 Dec 2015 00:25:26 +0000 (UTC)
Received: by srv10.000webhost.com (Postfix, from userid 6602671)
    id 929B018B5C7; Sun,  6 Dec 2015 19:25:26 -0500 (EST)
To: oneal.michaels@gmail.com
Subject: AeroBLOG - Verification Email: Welcome, MikeIsMyName
X-PHP-Script: aeroblog.tk/sendVerificationEmail.php for 172.73.244.114
MIME-Version: 1.0
Content-type: text/html; charset: utf8
From: <do-not-reply@aeroblog.tk>
Message-Id: <20151207002526.929B018B5C7@srv10.000webhost.com>
Date: Sun,  6 Dec 2015 19:25:26 -0500 (EST)


    <HTML>
    <HEAD>
        <TITLE>AeroBLOG - Verification Email: Welcome, MikeIsMyName</TITLE>
        <META http-equiv='content-type' content='text/html; charset=utf-8' />
        <STYLE>
    </HEAD>
    <BODY>

    <A href="http://aeroblog.tk/"><IMG src="http://aeroblog.tk/img/VerificationEmail.png" alt="copy & paste this link into your browsers navigation bar: http://........." width="1024px" height="768px"></A>

    </BODY>
    </HTML>

Some e-mail servers blocks images contents from some e-mails. Did you try looking at the "source code" of the e-mail? In gmail you can find it by clicking in Show Original Message. Another thing that can be happening is that the client is not able to access the image file in your website, or the image link is incorrect.

If you still have trouble with this, I recommend using PHPMailer to send your e-mails. It's really easy to use and has a lot of functions, such as SSL and TLS or Attachments in e-mails.