550 5.7.1 STOREDRV.Deliver; Unable to determine the sender's permission on public folder [Stage: Cre

Andi Andi

Hello Community,

Could somebody help me on following issue, please?

I get a message undelivered report when my 3rd application tool sends email to public folder. The tool is running on windows server and uses IIS local account to generate emails via a Relay Server Exchange2013 .

Here's the message header:


Diagnostic information for administrators:
Generating server: EXCHANGE2013.DOMAIN.LOCAL
Total retry attempts: 1
Remote Server returned '550 5.7.1 STOREDRV.Deliver; Unable to determine the sender's permission on public folder [Stage: CreateMessage]'
Original message headers:
 ( with Microsoft SMTP Server (TLS) id 15.0.995.29; Tue, 2 Oct 2018
 12:26:26 +0100
Received: from WEBSERVER.DOMAIN2.local ( by
 EXCHANGE2013.DOMAIN.LOCAL ( with Microsoft SMTP Server id 15.0.995.29
 via Frontend Transport; Tue, 2 Oct 2018 12:26:26 +0100
Received: from mail pickup service by WEBSERVER.DOMAIN2.local with Microsoft SMTPSVC;
     Tue, 2 Oct 2018 11:26:42 +0000
Thread-Topic: Hello World !
thread-index: AdRaQsrflkisG63yR9aX56R2BUwBZg==
Sender: PublicFolderEmail@domain.com
To: user@domain.com
Subject: Hello World !
Date: Tue, 2 Oct 2018 11:26:41 +0000
MIME-Version: 1.0
Content-Type: multipart/alternative;
X-Mailer: Microsoft CDO for Windows 2000
Importance: normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.4913
Content-Class: urn:content-classes:message
Priority: normal
X-OriginalArrivalTime: 02 Oct 2018 11:26:42.0079 (UTC) FILETIME=[CB0152F0:01D45A42]
Return-Path: PublicFolderEmail@domain.com

1 Reply

Did you edited the spf record to include your 3rd party application as a safe sender

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