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4xx responses are now SHOULD, not MAY

2004-04-09 15:17:12
On Sun, Mar 28, 2004 at 09:56:04PM -0800, Greg Connor wrote:
| >In section 3 of the specifications it says:
| >
| >     Error: indicates an error during lookup; an MTA MAY reject the
| >     message using a transient failure code, such as 450.
| >
| >I think "MAY" should be replaced by "SHOULD". Otherwise a spammer could
| 
| HOWEVER, on thinking about this a bit more, if we are serious about 
| stopping phishing/joe-job email, I can see some value in setting this to 
| SHOULD.

3 votes yea, 0 votes nay == consensus

   Error: indicates an error during lookup; an MTA SHOULD reject the
   message using a transient failure code, such as 450.

cheers
meng


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