• Re: can it be that 4xx errors are not being reported back to the client

    From Claus =?iso-8859-1?Q?A=DFmann?= @21:1/5 to None on Fri Apr 1 12:39:21 2022
    None wrote:

    It looks like the 4xx is not being relayed back to the sender (probably because the server is instructed to try again later)

    Correct.

    Is there an error response that informs the sender while the server
    still keeps trying?

    Depends on the MTA of the sender - sendmail uses
    Timeout.queuewarn
    for this - see the docs for details.

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  • From None@21:1/5 to All on Sat Apr 2 17:32:39 2022

    Is there an error response that informs the sender while the server
    still keeps trying?

    Depends on the MTA of the sender - sendmail uses
    Timeout.queuewarn
    for this - see the docs for details.


    Are RFC's defining things like what codes should generate response back
    to the sender?

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  • From Claus =?iso-8859-1?Q?A=DFmann?= @21:1/5 to None on Sun Apr 3 03:04:58 2022
    None wrote:

    Are RFC's defining things like what codes should generate response back
    to the sender?

    An MTA should send a "DSN" if a mail couldn't be delivered.
    AFAICT nothing else is defined in the RFCs, but maybe someone
    else read them more carefully -- or you can check RFC 2821/5321(?)
    yourself.

    Whether other notifications are sent is outside the scope of
    the RFCs because it is "local policy/configuration".

    --
    Note: please read the netiquette before posting. I will almost never
    reply to top-postings which include a full copy of the previous
    article(s) at the end because it's annoying, shows that the poster
    is too lazy to trim his article, and it's wasting the time of all readers.

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