CODEWITHSUNDEEP
htmlpowershell
sbagnato
sbagnato

Reputation: 496

Embed images in email and send via Powershell

I am editing one of my old scripts to send an email to a user with images embedded into the text. I am trying to use the Send-MailMessage function to send the email as opposed to the older method of $smtp.send($msg). However, when trying to update the script, the images are no longer being embedded.

I know how to attach them to the email as actual attachments, but I am not sure what I am doing wrong to have them show as actual embedded images.

NOTE: for brevity, I removed some of the full email since it is large and as long as I can get an image or two working, it will all work.

# force powershell to run as an x86 process
    Set-ExecutionPolicy -Scope CurrentUser Unrestricted
    if ($env:Processor_Architecture -ne "x86") {
        &"$env:windir\syswow64\windowspowershell\v1.0\powershell.exe" -file $myinvocation.Mycommand.path
        exit
    }

# initialize the script
    if ($startupvariables) { try {Remove-Variable -Name startupvariables  -Scope Global -ErrorAction SilentlyContinue } catch { } }
    New-Variable -force -name startupVariables -value ( Get-Variable | ForEach-Object { $_.Name } )
    [System.Reflection.Assembly]::LoadWithPartialName('Microsoft.VisualBasic') | Out-Null
    $Separator = ".", "@"

# advise what the script does
    Add-Type -AssemblyName PresentationCore,PresentationFramework
    $ButtonType = [System.Windows.MessageBoxButton]::OKCancel
    $MessageIcon = [System.Windows.MessageBoxImage]::Warning
    $MessageTitle = "Shared Drive Access Assistance"
    $MessageBody = "This script asks the user to provide more information regarding a network drive that they would like access to.`n`nTo use it, enter the below information:`n`n`n`tTicket Number`n`n`tUser's Email Address`n`n`tRequestor's Email Address`n`n`nIf this is the script you want to use, click OK.`nIf not, click Cancel."
    $Result = [System.Windows.MessageBox]::Show($MessageBody,$MessageTitle,$ButtonType,$MessageIcon)

    if ($Result -eq "Cancel")
    {
    Exit-PSSession
    }
    else
    {

# get the ticket number
    $Ticket = [Microsoft.VisualBasic.Interaction]::InputBox("Enter the SCTask ticket number" , "Ticket Number")

# get the user id via the email address
    $UserID = [Microsoft.VisualBasic.Interaction]::InputBox("Enter the user's email address" , "User Email Address")
    $User = $UserID.split($Separator)
    $Firstname = $User[0].substring(0,1).toupper()+$User[0].substring(1).tolower()
    $Lastname = $User[1].substring(0,1).toupper()+$User[1].substring(1).tolower()
    $User = $Firstname, $Lastname

# get local username
    $Username = [System.Environment]::UserName

# create email
    $subject = "Ticket $Ticket on Hold for User Response - Shared Drive Access for $User - Awaiting Additional Information"
    $body = @"
    <html>
    <body style="font-family:calibri"> 
    To $Requestor, $User,<br>
    <br>
    <br>
    In order to proceed with your request for shared drive access, we require the server name and full path to the folder you need access to. If you do not already know this information, you will need to provide these instructions to someone that already has access to the folder that you need access to.<br>
    <br>
    1)  Click the Start menu<br>
    <br>
    <img src="cid:image1.png"><br>
    <img src="cid:image2.png"><br>
    <img src="cid:image3.png"><br>
    <br>
    <br>
    2)  Navigate to "Computer"<br>
    <br>
    <img src="cid:image4.png"><br>
    <br>
    <br>

    <br>
    If you have any questions or need assistance with this process, please contact the Service Desk via one of the methods listed below. 
    <br>
    <br>
    Thank You,<br>
    <br>
    IT Service Desk<br>

    </body>
    </html>
"@

    $att1 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive1.png")
    $att2 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive2.png")
    $att3 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive3.png")
    $att4 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive4.png")
    $att1.ContentId = "image1.png"
    $att2.ContentId = "image2.png"
    $att3.ContentId = "image3.png"
    $att4.ContentId = "image4.png"
#    $msg.Attachments.Add($att1)
#    $msg.Attachments.Add($att2)
#    $msg.Attachments.Add($att3)
#    $msg.Attachments.Add($att4)

# create confirmation message
    $ButtonType = [System.Windows.MessageBoxButton]::YesNo
    $MessageIcon = [System.Windows.MessageBoxImage]::Warning
    $MessageTitle = "Shared Drive Access Assistance"
    $MessageBody = "The information you have entered is show below:`n`n`nTicket Number: $Ticket`n`nUser's Email Address: $UserID`n`nRequstor's Email Address: $RequestorID`n`n`nIf you would like to send the email, click Yes.`nOtherwise, click No."
    $Result = [System.Windows.MessageBox]::Show($MessageBody,$MessageTitle,$ButtonType,$MessageIcon)
    if ($Result -eq "No")
    {
    Exit-PSSession
    }
    else

# send email
    {
    Send-MailMessage -To "<$UserID>" -bcc "<[email protected]>" -from "<[email protected]>" -Subject $global:subject -SmtpServer "mailrelay.x.com" -BodyAsHtml -body $global:body
    }
    }

Function Clean-Memory {
    Get-Variable |
        Where-Object { $startupVariables -notcontains $_.Name } |
            ForEach-Object {
            try { Remove-Variable -Name "$($_.Name)" -Force -Scope "global" -ErrorAction SilentlyContinue -WarningAction SilentlyContinue}
                catch { }
 }
 }

Upvotes: 7

Views: 38859

Answers (3)

Craig.C
Craig.C

Reputation: 601

Here is a simple example using MailKit. I had do download the packages from https://www.nuget.org/packages/MimeKit and https://www.nuget.org/packages/MailKit and unpack with 7Zip as PowerShell was struggling to install from the CLI. I got some ideas from here but wanted to add an example of an embedded image, https://adamtheautomator.com/powershell-email.

You can do all sorts with MimeKit and MailKit including modern Auth which is great. It's also supper fast and the Client and even a Connection can be used in a loop to send lots of messages. There is probably an upper bound on how long to use a connection without refreshing?

$mailServer = "domain-com.mail.protection.outlook.com"

$SMTP = New-Object MailKit.Net.Smtp.SmtpClient

Add-Type -Path ".\mailkit.3.3.0\netstandard2.0\MailKit.dll"
Add-Type -Path ".\mimekit.3.3.0\netstandard2.0\MimeKit.dll"

$SMTP.Connect($mailServer, 25, [MailKit.Security.SecureSocketOptions]::StartTls, $False)

$Message  = New-Object MimeKit.MimeMessage
 
$message.From.Add("[email protected]");
$message.To.Add("[email protected]");
$message.Subject = "Some Subject";

$builder = [MimeKit.BodyBuilder]::new();

$image = $builder.LinkedResources.Add($path);
$image.ContentId=[MimeKit.Utils.MimeUtils]::GenerateMessageId();

$body = @"
 <html>
     <body style="font-family:calibri"> 
         <b>This is image 1</b>
         <img src="cid:$($image.ContentId)">
     </body>
 </html>
"@

$builder.HtmlBody = $body

#Now we just need to set the message body and we're done
$message.Body = $builder.ToMessageBody();
$SMTP.Send($Message)

$SMTP.Disconnect($true)
$SMTP.Dispose()

Upvotes: 2

Notanic
Notanic

Reputation: 21

You can embed the image into the HTML, therefore there are no extra files. It is replacing

{img=file}

with data URL

{src="data:image/png;base64,[base64 encoded long string representing the image]}

There are many online converters that can convert your image file into the required code.

Just google for Image to Data URI converter.

Upvotes: 2

ArcSet
ArcSet

Reputation: 6860

So the real question is how to embed a image into the HTML document from a attachment

CID aka Content ID will allow you to attach a image and then use that attached image in the document. Avoid using spaces in the Content ID name.

Send-MailMessage -To "[email protected]" -from "[email protected]" -SmtpServer SMTP.TEST.NET -Subject "Hello" -BodyAsHtml -Body "<img src='cid:Test.png'>" -Port 25 -Attachments "C:\Users\Test\Test.png"

You are using

$att1 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive1.png")
$att2 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive2.png")
$att3 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive3.png")
$att4 = new-object Net.Mail.Attachment ("T:\PS Scripts\Images\shareddrive4.png")
$att1.ContentId = "image1.png"
$att2.ContentId = "image2.png"
$att3.ContentId = "image3.png"
$att4.ContentId = "image4.png"

but when you send the mail you are not attaching those attachments

Send-MailMessage -To "<$UserID>" -bcc "<[email protected]>" -from "<[email protected]>" -Subject $global:subject -SmtpServer "mailrelay.x.com" -BodyAsHtml -body $global:body

You could stop using the Net.Mail.Attachment and instead do something like

$Body = @"
    <html>
        <body style="font-family:calibri"> 
            <b>This is image 1</b>
            <img src='cid:TEST1.png'>
            <b>This is image 2</b>
            <img src='cid:Test2.png'>
        </body>
    </html>
"@

Send-MailMessage -To "[email protected]" `
    -from "[email protected]" `
    -SmtpServer Test.smtp.com `
    -Subject "Hello" `
    -BodyAsHtml -body $body `
    -Attachments "C:\Test\TEST1.png", "C:\Test\TEST2.png"

Upvotes: 19

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