I'm having trouble sending email (via powershell for now) using an AD account which has been granted Send As permissions to a valid email account. I am passing the credentials for the AD account and using the FROM address of the email account. (This is being done from powershell usign smtp.Send.) If I change the credentials to another account it does send, so there's something different about this particular AD account.
When I attempt to send I get "the SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 client was not authenticated"
In the SMTP receive log I see this:
Inbound Negotiate failed because of LogonDenied
User Name: NULL
535 5.7.3 Authentication unsuccessful
MAIL FROM:<the-valid-email-account@yyy.com>,
530 5.7.1 Client was not authenticated
What has me perplexed is that I'm doing the same thing from another machine, where I'm using an AD account to send as this same valid email account. All I did in that case was grant the Send As permission to the AD account and it worked.
In this instance where it's not working I've also tried adding the ms-Exch-SMTP-Submit permission to the receive connector, but still cannot send email.
So I'm stumped as to what is different and needs changed in order to allow this AD account to send mail.
Thanks for any help you can provide.
- Edited by ewenix Friday, March 27, 2015 7:35 PM
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