为什么图片没有显示在gmail的html邮件中

本文关键字：html gmail 显示 为什么 | 更新日期: 2023-09-27 18:27:20

我正在尝试在HTML邮件中添加一个图像。当我将正文保存为html文件时，它会显示，但当我通过GMail将html正文

我以这种方式设置图像的来源：

var image = body.GetElementsByTagName("img");
string imageAttachmentPath = Path.Combine(Globals.NotificationTemplatesPath, "Header.png");
foreach (XmlElement img in image)
{
    img.SetAttribute("src", imageAttachmentPath);
    break;
}
//thats the method in which i am sending email.
public static void SendMessageViaEmailService(string from, 
                                              string sendTo, 
                                              string carbonCopy,
                                              string blindCarbonCopy, 
                                              string subject, 
                                              string body, 
                                              bool isBodyHtml,
                                              string imageAttachmentPath, 
                                              Hashtable images, 
                                              List<string> attachment, 
                                              string title = null, 
                                              string embeddedImages = null)
{
    Attachment image = new Attachment(imageAttachmentPath);
    MailMessage msg  = new MailMessage();
    msg.IsBodyHtml   = true;                   // email body will allow html elements
    msg.From = new MailAddress(from, "Admin"); // setting the Sender Email ID
    msg.To.Add(sendTo);                        // adding the Recipient Email ID
    if (!string.IsNullOrEmpty(carbonCopy))     // add CC email ids if supplied.
        msg.CC.Add(carbonCopy);
    msg.Subject = subject;                     //setting email subject and body
    msg.Body = body;
    msg.Attachments.Add(image);
    //create a Smtp Mail which will automatically get the smtp server details 
    //from web.config mailSettings section
    SmtpClient SmtpMail = new SmtpClient();
    SmtpMail.Host = "smtp.gmail.com";
    SmtpMail.Port = 587;
    SmtpMail.EnableSsl = true;
    SmtpMail.UseDefaultCredentials = false;
    SmtpMail.Credentials = new System.Net.NetworkCredential(from, "password");
    // sending the message.
    try
    {
        SmtpMail.Send(msg);
    }
    catch (Exception ex) { }
}

为什么图片没有显示在gmail的html邮件中

您的图像SRC属性很可能不是一个绝对的、可公开访问的URI。任何文件系统或本地URI都不会在电子邮件中显示图像。

具体来说，这些将不起作用：

c://test.png
test.png
/folder/test.png
http://localhost/test.png
http://internaldomain/test.png

确保您的图像URL是

  • 绝对（即从类似http://的协议开始）
  • 包括图像的完整路径
  • 该域是公共域

尝试这个线程的代码部分：

// creating the attachment
System.Net.Mail.Attachment inline = new System.Net.Mail.Attachment(@"c:''test.png");
inline.ContentDisposition.Inline = true;
// sending the message
MailMessage email = new MailMessage();
// set the information of the message (subject, body ecc...)
// send the message
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("localhost");
smtp.Send(email);
email.Dispose();
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