Script for Generating Random Email Content for Testing

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#Random Email Content Generator
#Copyright: Free to use, please leave this header intact
#Author: Leee Jeffries
#Company: LJC (https://www.leeejeffries.com)
#Script help: Designed to generate random email content to be passed to an SMTP server
#Purpose: Fill up a mailbox with random content
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##Introduction
#This script has been put together to enable random email content to be generated from Open Source content
#and then to relay that mail through a local SMTP relay. Once this content is generated a PST file can be
#exported and then imported into a live mailbox account on Office 365 for testing purposes. All content referenced
#here can be downloaded in a seperate zip file from my blog site. https://www.leeejeffries.com/wp-content/uploads/2018/09/Random_Content.zip
#The file paths will need to be changed to reflect the location you extract them to.
#
#The text content and subject lines of emails are generated from a public domain ebook
#The images, video and audio are all public domain open license so should be okay to use
#without incurring any copyright infringement
#
#Script to be run in powershell 2.0 or newer
#Just place in the smtpserver (Assuming unauthenticated) and the To and From address of the sender
#Amend the content locations and you are good to go
#Note: The script is infinite so a CTRL+C will exit it when you require it to stop
##

#Function to generate random text between 100 and 400 words from an array of strings
Function Random-Text([Array] $stringArray) {
#Reset the selected text varibale
$selectedText = ""
#Build the random number of times we will loop and collect words
$maximumWords = Get-Random -Minimum 100 -Maximum 1000
do {
$selectedText = $selectedText + $stringArray[(Get-Random -Maximum ([array]$stringArray).count)]
$selectedText = $selectedText + " "
$i++
} until ($i -eq $maximumWords)
return $selectedText
}

#Function to randomly generate an email subject from a random array of strings
Function Email-Subject([Array] $stringArray) {
#Reset the selected text varibale
$selectedText = ""
#Build the random number of times we will loop and collect words
$maximumWords = Get-Random -Minimum 1 -Maximum 10
do {
$selectedText = $selectedText + $stringArray[(Get-Random -Maximum ([array]$stringArray).count)]
$selectedText = $selectedText + " "
$i++
} until ($i -eq $maximumWords)
return $selectedText
}

#SMTP Server that will relay the email
#Review Send Send-MailMessage docs page for additional options on lines 90 and 93 to relay through a secure mailserver (You will need to add "Get-Credential to grab user credentials")
$smtpServer = "emailserver.net"

#Location of Movie file attachments
$movieLocation = "C:\temp\MOV"
#Location of MP3 music attachments
$audioLocation = "C:\temp\MP3"
#Location of JPG picture attachments
$imageLocation = "C:\temp\JPG"
#Location of text document that holds words, an ebook in this case
$textLocation = "C:\temp\ebook.txt"

#Address details
$toAddress = "person received the email"
$fromAddress = "person sending the email"

#Create all arrays of files and an array of words from the ebook
$movieFiles = @(Get-ChildItem -Path $movieLocation)
$audioFiles = @(Get-ChildItem -Path $audioLocation)
$imageFiles = @(Get-ChildItem -Path $imageLocation)
$textFile = Get-Content $textLocation
$stringArray = @($textfile.Split(" "))

#Set number of emails sent to track in output
$tracker = 0

#Loop through infinitly until CTRL+C is pressed
do {
#Select a random amount of words from our ebook and also a random file of each type
$selectedText = Random-Text -stringArray $stringArray
$selectedMovie = $movieFiles[(Get-Random -Maximum ([array]$movieFiles).count)]
$selectedAudio = $audioFiles[(Get-Random -Maximum ([array]$audioFiles).count)]
$selectedImage = $imageFiles[(Get-Random -Maximum ([array]$imageFiles).count)]

#Pick a number between 1 and 10 to see if the there will be a Movie,Music,Image or no attachment selected
$numberSelected = Get-Random -Minimum 1 -Maximum 10

switch($numberSelected){
1 {$selectedAttachment = $selectedMovie.FullName}
2 {$selectedAttachment = $selectedAudio.FullName}
3 {$selectedAttachment = $selectedImage.FullName}
4 {$selectedAttachment = ""}
5 {$selectedAttachment = ""}
6 {$selectedAttachment = ""}
7 {$selectedAttachment = ""}
8 {$selectedAttachment = ""}
9 {$selectedAttachment = ""}
10 {$selectedAttachment = ""}
}

#Call the function to generate a random email Subject
$selectedSubject = Email-Subject -stringArray $stringArray

If ($numberSelected -gt 3) {
#Send email without attachment
Send-MailMessage -To $toAddress -From $fromAddress -Subject $selectedSubject -Body $selectedText -SmtpServer $smtpServer -Verbose
} else {
#Send email WITH attachment
Send-MailMessage -To $toAddress -From $fromAddress -Subject $selectedSubject -Body $selectedText -SmtpServer $smtpServer -Attachments $selectedAttachment -Verbose
$selectedAttachment
}

#Increment email being sent
$tracker++

#Progress of email messages
"Email number $tracker - $numberSelected - $selectedSubject - $selectedAttachment"

} until ($x -eq 0)