Powershell script unable to send to multiple recipients

Question

I'm using a powershell script that will create an HTML report of disk space and send it as an email. Unfortunately I'm unable to get the script to send to more than one email recipient. The script I'm using can be found here:

http://gallery.technet.microsoft.com/scriptcenter/6e935887-6b30-4654-b977-6f5d289f3a63

Here are the relevant parts of the script...

$freeSpaceFileName = "FreeSpace.htm" 
$serverlist = "C:\sl.txt" 
$warning = 90 
$critical = 75 
New-Item -ItemType file $freeSpaceFileName -Force 

Function sendEmail 
{ param($from,$to,$subject,$smtphost,$htmlFileName) 
$body = Get-Content $htmlFileName 
$smtp= New-Object System.Net.Mail.SmtpClient $smtphost 
$msg = New-Object System.Net.Mail.MailMessage $from, $to, $subject, $body 
$msg.isBodyhtml = $true 
$smtp.send($msg) 
} 

$date = ( get-date ).ToString('yyyy/MM/dd') 
$recipients = "[email protected]", "[email protected]"
sendEmail [email protected] $recipients "Disk Space Report - $Date" smtp.server $freeSpaceFileName

I'm getting the following error

New-Object : Exception calling ".ctor" with "4" argument(s): "The specified string is not in the form required for an e
-mail address."
At E:\DiskSpaceReport.ps1:129 char:18
+ $msg = New-Object <<<<  System.Net.Mail.MailMessage $from, $to, $subject, $body
+ CategoryInfo          : InvalidOperation: (:) [New-Object], MethodInvocationException
+ FullyQualifiedErrorId : ConstructorInvokedThrowException,Microsoft.PowerShell.Commands.NewObjectCommand

Answer 1

The MailMessage constructor you are using only takes one email address. See the MSDN documentation http://msdn.microsoft.com/en-us/library/5k0ddab0.aspx

You should try using Send-MailMessage instead because it's -To parameter accepts an array of addresses

Send-MailMessage -from [email protected] -To $recipients -Subject "Disk Space Report - $Date" -smptServer smtp.server -Attachments $freeSpaceFileName

Note: Send-MailMessage was introduced in PowerShell v2.0 so that's why there are still examples that use other commands. If you need to use v1.0, then I will update my answer.

Answer 2

There are two methods to send emails using PowerShell:

1. For the Send-MailMessage method (Introduced in PowerShell Version 2):

   $to = "[email protected]", "[email protected]"

2. For the System.Net.Mail method (Works from PowerShell Version 1):

   $msg.To.Add("[email protected]")

   $msg.To.Add("[email protected]")