On Wed, 2 Apr 2008, Justin Mason wrote:

John Hardin writes:
On Tue, 1 Apr 2008, William Terry wrote:

Is there anything I can do to mitigate this?

Do you publish SPF records?

Logically this should have an effect, but in real-world terms, it doesn't. So don't worry about it.

Sure it won't if nobody ever publishes any SPF records.

Instead, try enabling the vbounce ruleset...

Certainly, do that. But *also* publish SPF records so that the people who *do* check SPF have a chance to reject forgeries proactively.

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 John Hardin KA7OHZ                    http://www.impsec.org/~jhardin/
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