Gmail阻止电子邮件模板中的嵌入式小图片 [英] Gmail blocking small embedded inline images in email template
本文介绍了Gmail阻止电子邮件模板中的嵌入式小图片的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在向我的成员发送电子邮件，看起来Gmail似乎阻止了我放入电子邮件中的图像。它们作为 base 64编码字符串嵌入到img标记中。我已经在网上查看了多个关于Gmail的主题，但没有发送任何帮助信息。
以下是我迄今尝试过的一些内容。
1.在Gmail中启用外部图像（通过设置图标）
2.将图像的大小减少到8000字节以下（Outlook.com不会发送图像〜15000字节）
如果我发送到Outlook.com电子邮件地址，我收到的图像就好了，但在Gmail中，img标签的src为空，并且电子邮件中没有图像。
我使用
tpl.html
分别将 img 元素替换为下列元素。请注意，数据网址已删除。 image1 和 image2 是为脚本中的每个内联附件指定的内容标识。
< img src =cid：image1alt =SpaceImagetitle =Space Imagestyle =display：blockwidth =225height =126/>
< img src =cid：image2alt =HostImagetitle =Host Imagestyle =display：blockwidth =225height =225/>
Embedded.vbs：
<预类= 朗动prettyprint-覆盖>
MSGBOX 稍等，您的电子邮件被发送。，vbOKOnly或者vbInformation
* *********** CONFIGURATION *************
Const smtpUsername =...
Const smtpPassword =...
Const smtpHost =smtp.sendgrid.net
Const smtpPort = 587
Const senderEmail =... @ ...
Const recipientEmail =... @ gmail .com
'************ CONFIGURATION *************
Const cdoRefTypeId = 0
设置Fso的=的CreateObject（ Scripting.FileSystemObject的）
将objMail =的CreateObject（ CDO.Message）
将objMail.Configuration
点域（ http://schemas.microsoft.com/cdo/configuration/smtpauthenticate ）= 1个
点域（ http://schemas.microsoft.com/cdo/configuration/sendusername）= smtpUsername
.Fields（http://schemas.microsoft.com/cdo/configuration/sendpassword）= smtpPassword
.Fields（ http://schemas.microsoft.com/cdo/configuration/smtpserver）= smtpHost
点域（ http://schemas.microsoft.com/cdo/configuration/smtpserverport）= SMTPPORT
.Fields（http://schemas.microsoft.com/cdo/configuration/sendusing）= 2
.Fields（http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout）= 20秒
.Fields.Update
端侧随着
将objMail
.AutoGenerateTextBody =假
。从= SENDEREMAIL
。为了= recipientEmail
.Subject =Inline Image Test
.BodyPart.ContentTransferEncoding =quoted-printable
.BodyPart.Charset =utf-8
'将图像作为内嵌附件添加到与图像源一起使用的内容ID。例如< img src =cid：image1
.AddRelatedBodyPart Fso.GetAbsolutePathName（image1.jpg），image1，cdoRefTypeId
.AddRelatedBodyPart Fso.GetAbsolutePathName（image2.jpg）， image2，cdoRefTypeId
'从文件
追加html body .HTMLBody = Fso.OpenTextFile（tpl.html）。ReadAll
.Send
End With
MsgBoxEmail successfully sent！Check your inbox。，vbOKOnly or vbInformation
双击并等待指示。
另见 https://stackoverflow.com/search?q=is%3Aquestion+%5Bemail%5D+inline+image
I'm sending emails to my members and it looks like Gmail is blocking the images I place in the email. These are embedded as a base 64 encoded string in an img tag. I've looked at multiple threads online about Gmail not sending images but haven't found anything that helps. Here are some of the things I've tried so far. 1. enabled external images in Gmail (through the settings icon) 2. reduced the size of the images to under 8000 bytes (Outlook.com wouldn't send images ~ 15000 bytes)
I receive the images just fine if I send to an outlook.com email address, but in Gmail the src of the img tag is empty, and no images show up in the email. I'm using https://putsmail.com to test/send my emails, so I know the issue isn't a problem with SendGrid (my email sending service) or my application.
Here is one of my templates below. I'm using an email template from litmuss. Everything below is basically default except the extra info I've added like the images and some extra text in the email body.
Here is a jsfiddle with a complete template with image data that can be copied right into putsmail and be sent to test! Any help or info as to why Gmail doesn't send the images would be great!
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<style type="text/css">
/* FONTS */
@@media screen {
@@font-face {
font-family: 'Lato';
font-style: normal;
font-weight: 400;
src: local('Lato Regular'), local('Lato-Regular'), url(https://fonts.gstatic.com/s/lato/v11/qIIYRU-oROkIk8vfvxw6QvesZW2xOQ-xsNqO47m55DA.woff) format('woff');
}
@@font-face {
font-family: 'Lato';
font-style: normal;
font-weight: 700;
src: local('Lato Bold'), local('Lato-Bold'), url(https://fonts.gstatic.com/s/lato/v11/qdgUG4U09HnJwhYI-uK18wLUuEpTyoUstqEm5AMlJo4.woff) format('woff');
}
@@font-face {
font-family: 'Lato';
font-style: italic;
font-weight: 400;
src: local('Lato Italic'), local('Lato-Italic'), url(https://fonts.gstatic.com/s/lato/v11/RYyZNoeFgb0l7W3Vu1aSWOvvDin1pK8aKteLpeZ5c0A.woff) format('woff');
}
@@font-face {
font-family: 'Lato';
font-style: italic;
font-weight: 700;
src: local('Lato Bold Italic'), local('Lato-BoldItalic'), url(https://fonts.gstatic.com/s/lato/v11/HkF_qI1x_noxlxhrhMQYELO3LdcAZYWl9Si6vvxL-qU.woff) format('woff');
}
}
/* CLIENT-SPECIFIC STYLES */
body, table, td, a {
-webkit-text-size-adjust: 100%;
-ms-text-size-adjust: 100%;
}
table, td {
mso-table-lspace: 0pt;
mso-table-rspace: 0pt;
}
img {
-ms-interpolation-mode: bicubic;
}
/* RESET STYLES */
img {
border: 0;
height: auto;
line-height: 100%;
outline: none;
text-decoration: none;
}
table {
border-collapse: collapse !important;
}
body {
height: 100% !important;
margin: 0 !important;
padding: 0 !important;
width: 100% !important;
}
/* iOS BLUE LINKS */
a[x-apple-data-detectors] {
color: inherit !important;
text-decoration: none !important;
font-size: inherit !important;
font-family: inherit !important;
font-weight: inherit !important;
line-height: inherit !important;
}
/* MOBILE STYLES */
@@media screen and (max-width:600px) {
h1 {
font-size: 32px !important;
line-height: 32px !important;
}
}
/* ANDROID CENTER FIX */
div[style*="margin: 16px 0;"] {
margin: 0 !important;
}
</style>
</head>
<body style="background-color: #f4f4f4; margin: 0 !important; padding: 0 !important;">
<!-- HIDDEN PREHEADER TEXT -->
<div style="display: none; font-size: 1px; color: #fefefe; line-height: 1px; font-family: 'Lato', Helvetica, Arial, sans-serif; max-height: 0px; max-width: 0px; opacity: 0; overflow: hidden;">
We're thrilled you created a YogaBandy event! Get ready for members to register.
</div>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<!-- LOGO -->
<tr>
<td bgcolor="#16749F" align="center">
<!--[if (gte mso 9)|(IE)]>
<table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
<tr>
<td align="center" valign="top" width="600">
<![endif]-->
<table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width: 600px;">
<tr>
<td align="center" valign="top" style="padding: 40px 10px 40px 10px;">
<a href="https://YogaBandy.com" target="_blank">
<img alt="Logo" src="http://litmuswww.s3.amazonaws.com/community/template-gallery/ceej/logo.png" width="40" height="40" style="display: block; width: 40px; max-width: 40px; min-width: 40px; font-family: 'Lato', Helvetica, Arial, sans-serif; color: #ffffff; font-size: 18px;" border="0">
</a>
</td>
</tr>
</table>
<!--[if (gte mso 9)|(IE)]>
</td>
</tr>
</table>
<![endif]-->
</td>
</tr>
<!-- HERO -->
<tr>
<td bgcolor="#16749F" align="center" style="padding: 0px 10px 0px 10px;">
<!--[if (gte mso 9)|(IE)]>
<table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
<tr>
<td align="center" valign="top" width="600">
<![endif]-->
<table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width: 600px;">
<tr>
<td bgcolor="#ffffff" align="center" valign="top" style="padding: 40px 20px 20px 20px; border-radius: 4px 4px 0px 0px; color: #111111; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 48px; font-weight: 400; letter-spacing: 4px; line-height: 48px;">
<h2 style="font-size: 48px; font-weight: 400; margin: 0;">Event Created</h2>
</td>
</tr>
</table>
<!--[if (gte mso 9)|(IE)]>
</td>
</tr>
</table>
<![endif]-->
</td>
</tr>
<!-- COPY BLOCK -->
<tr>
<td bgcolor="#f4f4f4" align="center" style="padding: 0px 10px 0px 10px;">
<!--[if (gte mso 9)|(IE)]>
<table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
<tr>
<td align="center" valign="top" width="600">
<![endif]-->
<table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width: 600px;">
<!-- COPY -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">We're excited you have created an event. Here are some of the details below.</p>
</td>
</tr>
<!-- Host Space -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">
<a href="https://www.YogaBandy.com/Space/Public/@Model.SpaceId" target="_blank" class="thumbnail" style="margin-bottom: 0px;">
<img alt="SpaceImage" title="Space Image" style="display: block" width="225" height="126" src="data:image/jpg;base64,@Raw(Model.SpaceThumbnail)" />
<div class="caption">
@Model.SpaceName
</div>
</a>
</p>
</td>
</tr>
<!-- Host Image -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">
<a href="https://www.YogaBandy.com/Profile/Public/@Model.HostId" target="_blank" class="thumbnail" style="margin-bottom: 0px;">
<img alt="HostImage" title="Host Image" style="display: block" width="225" height="225" src="data:image/jpg;base64,@Raw(Model.HostThumbnail)" />
<div class="caption">
@Model.HostName
</div>
</a>
</p>
</td>
</tr>
<!-- DATE -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">@Model.Date.ToLongDateString()</p>
</td>
</tr>
<!-- TIME -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">
<div>Time: @Model.Date.ToShortTimeString()</div>
</p>
</td>
</tr>
<!-- Location -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">@Model.Location</p>
</td>
</tr>
<!-- DURATION -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">@Model.Duration</p>
</td>
</tr>
<!-- STYLE -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 20px 30px 40px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">@Model.Style</p>
</td>
</tr>
<!-- BULLETPROOF BUTTON -->
<tr>
<td bgcolor="#ffffff" align="left">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td bgcolor="#ffffff" align="center" style="padding: 20px 30px 60px 30px;">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="center" style="border-radius: 3px;" bgcolor="#16749F"><a href="" target="_blank" style="font-size: 20px; font-family: Helvetica, Arial, sans-serif; color: #ffffff; text-decoration: none; color: #ffffff; text-decoration: none; padding: 15px 25px; border-radius: 2px; border: 1px solid #16749F; display: inline-block;">Add To Calendar</a></td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
<!-- COPY -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 0px 30px 20px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">If you have any questions, just send an email to the support address—we're always happy to help out.</p>
</td>
</tr>
<!-- COPY -->
<tr>
<td bgcolor="#ffffff" align="left" style="padding: 0px 30px 40px 30px; border-radius: 0px 0px 4px 4px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<p style="margin: 0;">Cheers,<br>The YogaBandy Team</p>
</td>
</tr>
</table>
<!--[if (gte mso 9)|(IE)]>
</td>
</tr>
</table>
<![endif]-->
</td>
</tr>
<!-- SUPPORT CALLOUT -->
<tr>
<td bgcolor="#f4f4f4" align="center" style="padding: 30px 10px 0px 10px;">
<!--[if (gte mso 9)|(IE)]>
<table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
<tr>
<td align="center" valign="top" width="600">
<![endif]-->
<table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width: 600px;">
<!-- HEADLINE -->
<tr>
<td bgcolor="#157b9d" align="center" style="padding: 30px 30px 30px 30px; border-radius: 4px 4px 4px 4px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;">
<h2 style="font-size: 20px; font-weight: 400; color: #111111; margin: 0;">Need more help?</h2>
<p style="margin: 0;"><a href="https://YogaBandy/Contact.com" target="_blank" style="color: #FFFFFF;">We’re here, ready to help</a></p>
</td>
</tr>
</table>
<!--[if (gte mso 9)|(IE)]>
</td>
</tr>
</table>
<![endif]-->
</td>
</tr>
<!-- FOOTER -->
<tr>
<td bgcolor="#f4f4f4" align="center" style="padding: 0px 10px 0px 10px;">
<!--[if (gte mso 9)|(IE)]>
<table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
<tr>
<td align="center" valign="top" width="600">
<![endif]-->
<table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width: 600px;">
<!-- NAVIGATION -->
<!-- PERMISSION REMINDER -->
<tr>
<td bgcolor="#f4f4f4" align="left" style="padding: 0px 30px 30px 30px; color: #666666; font-family: 'Lato', Helvetica, Arial, sans-serif; font-size: 14px; font-weight: 400; line-height: 18px;">
<p style="margin: 0;">You received this email because you just created a YogaBandy event. If it looks weird, <a href="https://YogaBandy.com" target="_blank" style="color: #111111; font-weight: 700;">view it in your browser</a>.</p>
</td>
</tr>
<!-- UNSUBSCRIBE -->
<!-- ADDRESS -->
</table>
<!--[if (gte mso 9)|(IE)]>
</td>
</tr>
</table>
<![endif]-->
</td>
</tr>
</table>
</body>
</html>
解决方案
Google refuses to show images with data url in Gmail's web interface. It's a known problem (in Google's view a security measure) for a long time highly criticized.
The good news is that you have another option except for using external images.
Using an inline attachment with a Content-ID works with Gmail.
After adding your images as inline attachments you'll need to point CID URLs instead of Data URLs in the html body.
There are plenty of modern libraries that will allow you to send emails with inline attachments easily. But I wrote a sample script in VBScript with CDO library, ready to use if you have a box Windows 2000+ installed.
Let's prepare the test environment.
Put the files in a directory as in the screenshot below.
tpl.html is the template file you gave. You'll need to make some changes in this file.
Replace both img elements with the following respectively. Note that data urls gone. image1 and image2 are the Content IDs specified for each inline attachments in the script. Nothing associated with file names here.
<img src="cid:image1" alt="SpaceImage" title="Space Image" style="display: block" width="225" height="126" />
<img src="cid:image2" alt="HostImage" title="Host Image" style="display: block" width="225" height="225" />
Embedded.vbs:
MsgBox "Wait while your email is being sent.", vbOKOnly Or vbInformation
'************ CONFIGURATION *************
Const smtpUsername = "..."
Const smtpPassword = "..."
Const smtpHost = "smtp.sendgrid.net"
Const smtpPort = 587
Const senderEmail = "...@..."
Const recipientEmail = "...@gmail.com"
'************ CONFIGURATION *************
Const cdoRefTypeId = 0
Set Fso = CreateObject("Scripting.FileSystemObject")
Set objMail = CreateObject("CDO.Message")
With objMail.Configuration
.Fields("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
.Fields("http://schemas.microsoft.com/cdo/configuration/sendusername") = smtpUsername
.Fields("http://schemas.microsoft.com/cdo/configuration/sendpassword") = smtpPassword
.Fields("http://schemas.microsoft.com/cdo/configuration/smtpserver") = smtpHost
.Fields("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = smtpPort
.Fields("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
.Fields("http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout") = 20 'secs
.Fields.Update
End With
With objMail
.AutoGenerateTextBody = False
.From = senderEmail
.To = recipientEmail
.Subject = "Inline Image Test"
.BodyPart.ContentTransferEncoding = "quoted-printable"
.BodyPart.Charset = "utf-8"
'Adding images as inline attachments with Content IDs which is used with image sources. e.g. <img src="cid:image1"
.AddRelatedBodyPart Fso.GetAbsolutePathName("image1.jpg"), "image1", cdoRefTypeId
.AddRelatedBodyPart Fso.GetAbsolutePathName("image2.jpg"), "image2", cdoRefTypeId
'append html body from file
.HTMLBody = Fso.OpenTextFile("tpl.html").ReadAll
.Send
End With
MsgBox "Email successfully sent! Check your inbox.", vbOKOnly Or vbInformation
Double click and wait for instructions.
See also https://stackoverflow.com/search?q=is%3Aquestion+%5Bemail%5D+inline+image
这篇关于Gmail阻止电子邮件模板中的嵌入式小图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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