Outlook PowerShell script to set Direct Replies To address - powershell

Question

I have an automated powershell script to send alert email. Since the alert are send from a generic email.. i want people replying to the email to goto another email address say efg#outlook.com.
$Outlook = New-Object -comObject Outlook.Application
$Mail = $Outlook.CreateItem(0)
$Mail.To = "asd#outlook.com"
$Mail.Subject = "Alert Email"
$Mail.HtmlBody = $HTML
$Mail.Headers.Add("In-Reply-To", "<efg#outlook.com>")
$Mail.display()
$Mail.send()
somehow this is not working.
Managed to get it from the below
ReplyRecipientNames
$Mail.ReplyRecipientNames = "efg#outlook.com"

Answer 1

Firstly, MailItem object does not expose the Headers property - your script will stop rigth there.
If you want to redirect replies to a different address, use Mail.ReplyRecipients.Add("efg#outlook.com")

Answer 2

You can use the MailItem.SendUsingAccount property which allows setting up an Account object that represents the account under which the MailItem is to be sent. Be aware, the account should be configured in Outlook in that case. For example, here is a VBA code sample which shows how to set up the property:
Sub SendUsingAccount()
Dim oAccount As Outlook.account
For Each oAccount In Application.Session.Accounts
If oAccount.AccountType = olPop3 Then
Dim oMail As Outlook.MailItem
Set oMail = Application.CreateItem(olMailItem)
oMail.Subject = "Sent using POP3 Account"
oMail.Recipients.Add ("someone#example.com")
oMail.Recipients.ResolveAll
Set oMail.SendUsingAccount = oAccount
oMail.Send
End If
Next
End Sub
For Exchange users you may also consider using the MailItem.SentOnBehalfOfName property which is represented by a string indicating the display name for the intended sender of the mail message.
But also you may be interested in the MailItem.ReplyRecipients property which returns a Recipients collection that represents all the reply recipient objects for the Outlook item. The following article which I wrote for the technical blog shows how to deal with a recipient collection, see How To: Fill TO,CC and BCC fields in Outlook programmatically for more information.