Format raw data email message for sending attachments with AWS Send-SES2Email

ConvertTo-RawDataEmail.ps1

function ConvertTo-RawDataEmail {
  <#
  .SYNOPSIS
  Format an email message for AWS Send-SES2Email -Raw_Data
  .DESCRIPTION
  Accepts From, To, Cc, Bcc, Subject, Body, and Attachments, uses
  System.Net.Mail to format the message into a byte array that
  Send-SES2Email -Raw_Data can accept.
  .PARAMETER From
  [String] Sender's email address
  .PARAMETER To
  [String[]] Recipients' email addresses
  .PARAMETER Cc
  [String[]] Carbon copy addresses
  .PARAMETER Bcc
  [String[]] Blind carbon copy addresses
  .PARAMETER Subject
  [String] The subject line of the email
  .PARAMETER Body
  [String] The plain text body of the email
  .PARAMETER Attachments
  [String[]] The full paths to the attachments
  .OUTPUTS
  [Byte[]] A byte array of the formatted message
  .NOTES
  Author: Nick Vissari
  .EXAMPLE
  $RawData = ConvertTo-RawDataEmail -From "sender@example.com" -To "bob@example.com", "mary@example.com" -Subject "The files you wanted" -Body "Attached" -Attachments "C:\File1.txt", "C:\File2.txt"
  Send-SES2Email -Raw_Data $RawData
  #>
  param(
    [String]$From,
    [String[]]$To,
    [String[]]$Cc,
    [String[]]$Bcc,
    [String]$Subject,
    [String]$Body,
    [String[]]$Attachments
  )

  $Message = New-Object Net.Mail.MailMessage
  $Message.From = $From
  $Message.Subject = $Subject
  $Message.Body = $Body

  ForEach($Address in $To){
    $Message.To.Add($Address)
  }

  ForEach($Address in $Cc){
    $Message.Cc.Add($Address)
  }

  ForEach($Address in $Bcc){
    $Message.Bcc.Add($Address)
  }

  ForEach($FilePath in $Attachments){
    $Attachemnt = New-Object Net.Mail.Attachment($FilePath)
    $Message.Attachments.Add($Attachemnt)
  }

  $Client = New-Object Net.Mail.SmtpClient
  $Client.DeliveryMethod  = "SpecifiedPickupDirectory"
  $TempDir = [String](New-TemporaryFile)
  Remove-Item $TempDir -Force
  New-Item $TempDir -ItemType Directory | Out-Null
  $Client.PickupDirectoryLocation = $TempDir
  $Client.Send($Message)
  ForEach($Item in (Get-ChildItem $TempDir)){
    Get-Content $Item -AsByteStream
    Remove-Item $Item -Force
  }
  Remove-Item $TempDir -Force
}