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Re: SPF and Greylist

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From:
Bryan Scott
Date:
June 28, 2005 09:59
Subject:
Re: SPF and Greylist
Message ID:
42C18278.2050305@beehive.net
>>What is far more likely is that spammer will find the lazy 
>>administrators who set up an SPF record with '-all' and use those 
>>domains exclusively to forge their return addresses.  Of course, that in 
>>itself will lead to sites using SPF to discount *any* record containing 
>>'-all' so spammers will not be able to use this for very long.

> I find this counter-intuitive.  Please explain.
> 
> Doesn't -all mean the admin has done the work to positively identify all
> the valid sources of email from his domain?

That was what I was going to ask.  Unless you're suggesting they *only* 
put in '-all'.

-- Bryan

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