On Thu, Jun 9, 2022 at 10:07 AM Brandon Long <bl...@google.com> wrote:
> > > On Thu, Jun 9, 2022 at 7:47 AM Otto J. Makela <o...@iki.fi> wrote: > >> On 08/06/2022 21.25, Brandon Long via mailop wrote: >> >> > so the false positive rate for the new rule is better. It doesn't >> > even need to be a new rule, maybe your reputation just decreased >> > slightly and it now is below the threshold. >> >> I know of a couple of similar cases -- to me it seems Google's Bayesian >> heuristic (if there is such a thing) was over-zealous or something. >> It did not seem to matter if the outgoing messages passed SPF tests and/or >> had a correct DKIM signature: dsn=5.0.0, stat=Service unavailable. >> > Looking more specifically at this, "Service unavailable" is not something we return, any message we return should have - gsmtp in it. We have "Temporarily Unavailable" (or similar), but that should be a 4xx response. Brandon
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