Alternative Ways to Send Emails with PowerShell

I am facing an issue with sending emails using a PowerShell script as my company's Virus scan (McAfee) is blocking port 25. While I am aware of the option to disable the "prevent mass email" setting in McAfee and calling Outlook within the script, both options are not ideal for me. Hence, I am seeking alternative methods to send emails using PowerShell without resorting to the mentioned options.

Thank you. 

 $From = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="87e9e6eae2c7e9e6eae2a9e4e8ea">[email protected]</a>"
 $To = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="fe909f939bbe909f939bd09d9193">[email protected]</a>"
 $Body = Test" 
 $Subject2 = "Hi"
 $SMTPServer ="smtp.com"

Send-MailMessage -From $From -To $To -SmtpServer $SMTPServer -Subject $Subject1 -Body $Body'

$Outlook = New-Object -ComObject Outlook.Application
$Mail = $Outlook.CreateItem(0)
$Mail.To = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d9b7b8b4bc99b7b8b4bcf7bab6b4">[email protected]</a>"
$Mail.Subject = "Hi"
$Mail.Body = "Hello"[System.Security.Principal.WindowsIdentity]::GetCurrent().Name
$Mail.Send() '
phpemailpowershelloutlook

Answer №1

Explore .NET Framework Classes

An option is to utilize .NET classes by manually creating a [MailMessage] object and sending it through the [SmtpClient] class. However, be cautious as this method might trigger issues with McAfee software similar to what Send-MailMessage does.

$From = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="adc3ccc0c8edc3cc80cdc3c5">[email protected]</a>"
$To = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="2749464a426749464420474b49">[email protected]</a>"
$Body = "Test" 
$Subject2 = "Hi"
$SMTPServer ="smtp.com"

$message = New-Object System.Net.Mail.MailMessage $From, $To
$message.Subject = $Subject2
$message.Body = $Body

$smtpclient = New-Object Net.Mail.SmtpClient($SMTPServer)
$smtpclient.Send($message)
  • Find more information here

Leverage Exchange Web Services

To utilize EWS effectively, ensure you have the Microsoft.Exchange.WebServices.dll file which can typically be located in directories such as:

A sample function implementation of EWS sourced from Mike Pfeiffer's blog is provided below:

Function Send-EWSMailMessage {
  [CmdletBinding()]
  param(
    [Parameter(Position=0, ValueFromPipelineByPropertyName=$true, Mandatory=$true)]
    [Object]
    $PrimarySmtpAddress,

    [Parameter(Position=1, Mandatory=$true)]
    [System.String]
    $Subject,

    [Parameter(Position=2, Mandatory=$true)]
    [System.String]
    $Body
    )

  BEGIN {
    Add-Type -Path "C:\bin\Microsoft.Exchange.WebServices.dll"
    $sid = [System.Security.Principal.WindowsIdentity]::GetCurrent().User.Value
    $user = [ADSI]"LDAP://<SID=$sid>"
  }

  PROCESS {
    $service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService
    $service.AutodiscoverUrl($user.Properties.mail)

    if($PrimarySmtpAddress -is [Microsoft.Exchange.Data.SmtpAddress]) {
      $Recipient = $PrimarySmtpAddress.ToString()
    } else {
      $Recipient = $PrimarySmtpAddress
    }

    $mail = New-Object Microsoft.Exchange.WebServices.Data.EmailMessage($service)
    $mail.Subject = $Subject
    $mail.Body = $Body

    [Void]$mail.ToRecipients.Add($Recipient)
    $mail.SendAndSaveCopy()
  }

  END {
  }
}
  • Resource on Sending Email with PowerShell and the EWS Managed API

Although not tailored for PowerShell implementations, the link below provides valuable insights:

Answer №2

Does your current SMTP server have the capability for encrypted connections? If it does, you can test it with the following code:

Send-MailMessage -To $to -From $from -SmtpServer $smtp -UseSsl -Port "587"

I am unable to test this myself as I do not have McAfee installed.

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