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XCCDF
Guide to the Secure Configuration of openSUSE
Services
Mail Server Software
Configure Operating System to Protect Mail Server
Configure Postfix if Necessary
Control Mail Relaying
Require SMTP AUTH Before Relaying from Untrusted Clients
Require SMTP AUTH Before Relaying from Untrusted Clients
An XCCDF Group - A logical subset of the XCCDF Benchmark
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Require SMTP AUTH Before Relaying from Untrusted Clients
SMTP authentication allows remote clients to relay mail safely by requiring them to authenticate before submitting mail. Postfix's SMTP AUTH uses an authentication library called SASL, which is not part of Postfix itself. To enable the use of SASL authentication, see
http://www.postfix.org/SASL_README.html