(PowerShell) Outlook Send HTML Email with Embedded Images

This example sends an HTML email with embedded images. Other examples exist for:

Sending plain-text email.
Sending email with attachments.
Sending HTML email with embedded images and attachments.

Chilkat .NET Downloads

Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# Important: This example requires Chilkat v9.5.0.68 or greater.

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$http = New-Object Chilkat.Http

# Use your previously obtained access token here:
# See the following examples for getting an access token:
#    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
#    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
#    Refresh Access Token (Azure AD v2.0 Endpoint).
#    Refresh Access Token (Azure AD Endpoint).

$http.AuthToken = "MICROSOFT_GRAPH_ACCESS_TOKEN"

# To send mail, we'll POST to the following endpoint:
# 
# POST /users/{id | userPrincipalName}/sendMail
# 
# (The special keyword "me" may be used in place of a principal name.)
# 

# This example will send HTML email containing the following HTML body.
# After the 

# 	<html>
# 	<head>
# 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
# 	<meta content="text/html; charset=utf-8">
# 	</head>
# 	<body bgcolor="#FFFFFF">
# 	<font face="Calibri">This is a test <b>HTML email with embedded images</b>.<br>
# 	<br>
# 	<img alt="" src="cid:starfish"><br>
# 	<img alt="" src="cid:hedgehogs"><br>
# 	</font>
# 	</body>
# 	</html>

# Build the HTML body...
$bCrlf = $true
$sbHtmlBody = New-Object Chilkat.StringBuilder
$sbHtmlBody.AppendLine("<html>",$bCrlf)
$sbHtmlBody.AppendLine("<head>",$bCrlf)
$sbHtmlBody.AppendLine("<meta http-equiv=`"Content-Type`" content=`"text/html; charset=utf-8`">",$bCrlf)
$sbHtmlBody.AppendLine("<meta content=`"text/html; charset=utf-8`">",$bCrlf)
$sbHtmlBody.AppendLine("</head>",$bCrlf)
$sbHtmlBody.AppendLine("<body bgcolor=`"#FFFFFF`">",$bCrlf)
$sbHtmlBody.AppendLine("<font face=`"Calibri`">This is a test <b>HTML email with embedded images</b>.<br>",$bCrlf)
$sbHtmlBody.AppendLine("<br>",$bCrlf)
$sbHtmlBody.AppendLine("<img alt=`"`" src=`"cid:starfish`"><br>",$bCrlf)
$sbHtmlBody.AppendLine("<img alt=`"`" src=`"cid:hedgehogs`"><br>",$bCrlf)
$sbHtmlBody.AppendLine("</font>",$bCrlf)
$sbHtmlBody.AppendLine("</body>",$bCrlf)
$sbHtmlBody.AppendLine("</html>",$bCrlf)

# Load the image files.
$jpgStarfish = New-Object Chilkat.BinData
$jpgStarfish.LoadFile("qa_data/jpg/starfish.jpg")
$jpgHedgeHogs = New-Object Chilkat.BinData
$jpgHedgeHogs.LoadFile("qa_data/jpg/hedgehogs.jpg")

# The body of the POST request contains JSON that specifies the email subject, body,
# recipients, etc.  This example will build the following JSON HTML email:
# 

# 	{
# 	  "message": {
# 	    "subject": "Sample HTML Email with Embedded Images",
# 	    "body": {
# 	      "contentType": "html",
# 	      "content": "The HTML body goes here..."
# 	    },
# 	    "toRecipients": [
# 	      {
# 	        "emailAddress": {
# 		  "name": "Chilkat Software",
# 	          "address": "admin@chilkat.io"
# 	        }
# 	      },
# 	      {
# 	        "emailAddress": {
# 	          "address": "chilkat.support@gmail.com"
# 	        }
# 	      }
# 	    ],
# 	    "ccRecipients": [
# 	      {
# 	        "emailAddress": {
# 		  "name": "Chilkat Blog",
# 		  "address": "admin@cknotes.com"
# 	        }
# 	      }
# 	    ],
# 	    "attachments": [
# 	       {
# 	         "@odata.type": "#microsoft.graph.fileAttachment",
# 	         "name": "starfish.jpg",
# 	         "contentType": "image/jpeg",
# 	         "size": 6497,
# 	         "isInline": true,
# 	         "contentId": "starfish",
# 	         "contentLocation": null,
# 	         "contentBytes": "base64_data_here"
# 	       },
# 	       {
# 	         "@odata.type": "#microsoft.graph.fileAttachment",
# 	         "name": "hedgehogs.jpg",
# 	         "contentType": "image/jpeg",
# 	         "size": 48845,
# 	         "isInline": true,
# 	         "contentId": "hedgehogs",
# 	         "contentLocation": null,
# 	         "contentBytes": "base64_data_here"
# 	       }
# 	    ]
# 	  },
# 	  "saveToSentItems": true
# 	}
# 
# Build the above JSON.
$json = New-Object Chilkat.JsonObject
$json.UpdateString("message.subject","Sample HTML Email with Embedded Images")
$json.UpdateString("message.body.contentType","html")
$json.UpdateString("message.body.content",$sbHtmlBody.GetAsString())

$json.UpdateString("message.toRecipients[0].emailAddress.name","Chilkat Software")
$json.UpdateString("message.toRecipients[0].emailAddress.address","admin@chilkat.io")
$json.UpdateString("message.toRecipients[1].emailAddress.address","chilkat.support@gmail.com")
$json.UpdateString("message.ccRecipients[0].emailAddress.name","Chilkat Blog")
$json.UpdateString("message.ccRecipients[0].emailAddress.address","admin@cknotes.com")

$json.UpdateString("message.attachments[0].`"@odata.type`"","#microsoft.graph.fileAttachment")
$json.UpdateString("message.attachments[0].name","starfish.jpg")
$json.UpdateString("message.attachments[0].contentType","image/jpeg")
$json.UpdateInt("message.attachments[0].size",$jpgStarfish.NumBytes)
$json.UpdateBool("message.attachments[0].isInline",$true)
# This contentId must match the "cid:" in the HTML
$json.UpdateString("message.attachments[0].contentId","starfish")
$json.UpdateNull("message.attachments[0].contentLocation")
$json.UpdateBd("message.attachments[0].contentBytes","base64",$jpgStarfish)

$json.UpdateString("message.attachments[1].`"@odata.type`"","#microsoft.graph.fileAttachment")
$json.UpdateString("message.attachments[1].name","hedgehogs.jpg")
$json.UpdateString("message.attachments[1].contentType","image/jpeg")
$json.UpdateInt("message.attachments[1].size",$jpgHedgeHogs.NumBytes)
$json.UpdateBool("message.attachments[1].isInline",$true)
# This contentId must match the "cid:" in the HTML
$json.UpdateString("message.attachments[1].contentId","hedgehogs")
$json.UpdateNull("message.attachments[1].contentLocation")
$json.UpdateBd("message.attachments[1].contentBytes","base64",$jpgHedgeHogs)

$json.UpdateBool("saveToSentItems",$true)

# -------------------------------------------------------------
# Important: This example requires Chilkat v9.5.0.68 or greater.
# -------------------------------------------------------------

# Send the HTTP POST (i.e. send the HTML email)
$resp = $http.PostJson3("https://graph.microsoft.com/v1.0/me/sendMail","application/json",$json)
if ($http.LastMethodSuccess -ne $true) {
    $($http.LastErrorText)
    exit
}

# The send succeeded if the response status code = 202.
# In the success case, there is no response body.  (We just get the response code to know that it succeeded.)
if ($resp.StatusCode -ne 202) {
    $json.Load($resp.BodyStr)
    $json.EmitCompact = $false
    $($json.Emit())
    $("Failed, response status code = " + $resp.StatusCode)
}
else {
    $("Outlook HTML Mail Sent.")
}