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aussie-isp /
2005-06
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Date: Sun, 12 Jun 2005 17:04:37 +1000
From: Craig Sanders To: Craig Ian Dewick Cc: aussie-isp, Oz-ISP Message-Id: <20050612070437.GK6237@taz.net.au> In-Reply-To: <Pine.GSO.4.58.0506121630140.12879@lios.apana.org.au> References: <200506110137.j5B1b3EI030170@mailout2.pacific.net.au> <Pine.BSF.4.33.0506111840570.1517-100000@home.albury.net.au> <20050612030327.GD6237@taz.net.au> <Pine.GSO.4.58.0506121630140.12879@lios.apana.org.au> Subject: Re: [Oz-ISP] Helo Pacific |
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On Sun, Jun 12, 2005 at 04:31:42PM +1000, Craig Ian Dewick wrote: > Do any MTA's use the SPF data by default, or does it need to be > enabled via config options? dunno. i know that with postfix you need a policy daemon to use SPF directly (there are a few available that do both greylisting and SPF and some other anti-spam/anti-virus checks). or you can use it in SpamAssassin to contribute to the score. > Is the data of any use to an MTA in the first place? yes. for rejecting mail where the SPF record for the envelope From address and/or the HELO name doesn't list the connecting smtp client. > Is there any benefit to having the MTA use it for domain > anti-spoofing? yes. the SPF record for a domain contains the list of hosts which the domain's owner authorises to send mail FROM that domain. i can't think of anyone else who would be authoritative for such a list than the domain owner. craig -- craig sanders <c a s @ t a z . n e t . a u (part time cyborg) ---- email "unsubscribe aussie-isp" to m a j o r d o m o @ a u s s i e . n e t to be removed. |
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