On 2018-06-07 16:44, Jeremy Harris wrote:

> >> 2018-05-29 12:25:40 H=haskell.org [23.253.242.70]:51176 sender verify
> >> defer for <[email protected]>: Could not complete
> >> sender verify callout: mail.haskell.org [23.253.242.70] : 
> >> response to "RCPT TO:<[email protected]>" was: 250 
> >> 2.1.5 Ok
> >> 2018-05-29 12:25:40 H=haskell.org [23.253.242.70]:51176
> >> F=<[email protected]> temporarily rejected RCPT
> >> <[email protected]>:
> >> Could not complete sender verify callout
> > 
> >> Why exim "Could not complete" the callout when it got a success code?

> It's the "random" test.  You don't want it to succeed; it means
> that this domain will accept _anything_.  You got a 250, acceptance.

Well OK, but the spec says (43.46):

 If the “random” check succeeds, the result is saved in a cache record,
 and used to force the current and subsequent callout checks to succeed
 without a connection being made, until the cache record expires.

Note "current".

Maybe this is a confusion about what it means to "succeed"?

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