We have a Sharepoint 2007 environment and Exchange 2003. We use SharePoint to send email to different distribution lists within Exchange.
When we send email from Sharepoint to a distribution list that does NOT have the "From authenticated users only" option checked in the Exchange General Tab of the group, email is received without a problem.
However, when email is send from Sharepoint with the "From authenticated users only" checked, email never comes through.
I assume this is because Sharepoint is not authenticating before it sends email via SMTP.
I gave the IP address of the Sharepoint server the ability to relay through our Exchange server, but that did not solve the problem.
Do I need to specify authentication settings elsewhere on the SharePoint server? I did not see anywhere within the Sharepoint Central admin to do so. Do I need to adjust the settings on the SMTP server section within IIS?
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