Re: Issues with Specific Outgoing E-Mail on Private IIS SMTP server
- From: "Sanford Whiteman" <swhitemanlistens-software@xxxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 04 Jan 2009 14:52:00 -0500
folder. Upon looking at the email in there, I see the following:
Diagnostic-Code: smtp;550 Access denied - Invalid HELO name (See RFC2821
4.1.1.1). I will post the entire contents of this email file below.
Your mailserver needs to pass the PTR-EHLO-A roundtrip described in great detail in the archives of this list. In brief, you need a PTR for your public IP, your EHLO (Fully Qualified Host Name in IIS SMTP config) needs to match the PTR, and there needs to be an A record for the hostname that points back to the public IP. Any divergence from these requirements will mean that you can't guarantee outbound mail will be accepted.
--Sandy
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Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
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