On 2022-09-16 at 04:43:35 UTC-0400 (Fri, 16 Sep 2022 08:43:35 +0000)
Claus Assmann <[email protected]>
is rumored to have said:

On Fri, Sep 16, 2022, Stephen Satchell wrote:

By doing some testing, I found that Google was silently rejecting mail from

What does "silently rejecting" mean?

That is a good question, as it seems to me to be impossible in SMTP.

If Google is giving a 4xx or 5xx reply code in SMTP and you never hear about it, that is not Google's fault, and it is NOT silent rejection. This is why one should always stand up the local mail subsystem on any server that generates email and deliver through that, so that there's a fault-handling mechanism that can do any needed retries or alerts to failures.

Do you mean "accepting the mail but not delivering to the recipient"
(not even to the infamous "spam folder")?

That would be novel for Google. MS has always done it but not everyone concurs with that being 'innovative' in any positive sense.


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Bill Cole
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(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
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