George Schlossnagle <george(_at_)sparkpost(_dot_)com> wrote:
We see a good bit of email here and the number of 551s that seem to
indicate forwarding is being suggested is incredibly tiny. I could run
some stats if you like, but call it < 0.0002% over the past year's bounces.
Thanks. Do you see any 251 at all?
Email being what it is, there's lots of use of 551 for other purposes
(anti-abuse feedback, etc).
Not surprising. In response to RCPT TO or something else?
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