sendMail.ps1

# Function to send email
function sendMail
{
     <#
     .SYNOPSIS
     Function to send email to supplied email address.

     .DESCRIPTION
     Function takes the provided email address, subject and message, formates an email and sends it to the configured SMTP server.
     The subject line is optional.
     The default subject string can be changed if you don't want to supply a subject parameter.

     .NOTES
     The following variable need to be set for this function to work correctly:

     $date = (Get-Date -Format "M-d-yyyy")
     $starTime = (Get-Date -Format "HH:mm:ss")
     $smtpServ = "<SMTP Server>"
     $fromAddr = "<From email address>"

     .EXAMPLE
     sendMail -EmailAddress "<To email address" -Subject "<Email subject line>" -Message "<Email message body>"

     sendMail -EmailAddress "[email protected]" -Subject "Test email" -Message "Test Body: This is a test."

     #>

     param (
        [Parameter(Mandatory)]
        [string]$EmailAddress,

        [Parameter()]
        [string]$Subject = "Emergency Site Shutdown - $date", # Default value if none is provided.

        [Parameter(Mandatory)]
        [string]$Message

     )

     # Send email with formated message
     Send-MailMessage -From $fromAddr -To $EmailAddress -Subject $Subject -Body $Message -SmtpServer $smtpServ -Port $smtpPort
}