E-Mail sending with Send-MailMessage works, but not with SmtpClient

Question

The following Powershell script works on my Windows Server 2012:

send-mailmessage -from "[email protected]" -to "[email protected]" -Subject "test" -Body "test body" -smtpserver myhostip -credential "mydomain\myuser"

When I execute it, a window appears that prompts for the password of the specified user. I enter the password and the e-mail is sent.

However, the following script does not work:

$smtp = New-Object Net.Mail.SmtpClient("myhostip") $smtp.usedefaultcredentials = $false $smtp.enablessl = $false $smtp.credentials = new-object net.networkcredential("myuser", "mypassword", "mydomain") $smtp.send("[email protected]", "[email protected]", "test", "test body")

It results in the error message

Exception calling "Send" with "4" argument(s): "Mailbox unavailable. The server response was: 5.7.1 <[email protected]>... Relaying denied. IP name lookup failed [ip-address-of-my-web-server]"

What's the difference? How can I get the second script to work?

did you try turning it all into variables and plugging the variables into the first script, wouldn't that work? — Luke
– Luke, Commented May 27, 2015 at 14:32
Duh!! The from address had one - character missing in the SmtpClient version of the script. THANK YOU!! — Jonas Sourlier
– Jonas Sourlier, Commented May 27, 2015 at 15:11

Luke · Accepted Answer · 2015-05-27 16:20:55Z

1

did you try turning it all into variables and plugging the variables into the first script, wouldn't that work?

answered May 27, 2015 at 16:20

Luke

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