spf-discuss
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Re: MUST SPF checking be done during SMTP time?

2005-05-14 08:32:04
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Chuck Mead wrote:
We keep talking about this as though there is nothing wrong with
bouncing

Just to set things straight: _nowhere_ have I implied that there was 
nothing wrong with sending bounces to unauthenticated sender addresses.

and as though we're concerned about implementation like spamassassin.

We should, because those implementations would not necessarily be 
incompliant (i.e. if they do things right), unless we explicitly declare 
them so.  Projects like SpamAssassin will discover that there _is_ a way 
to do things right past SMTP time[1], and thus implement SPF, like it or 
not.

In this regard, this issue is very much unlike the "checking against other 
identities" issue, where there is simply no way to do things right.

Footnotes:
 1. Doing things right past SMTP time means: using reliable identities,
    not generating bounces, etc.
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