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computers / comp.mail.sendmail / Re: can it be that 4xx errors are not being reported back to the client?

SubjectAuthor
* can it be that 4xx errors are not being reported back to the client?None
`* Re: can it be that 4xx errors are not being reported back to the client?Claus Aßmann
 `* Re: can it be that 4xx errors are not being reported back to theNone
  `- Re: can it be that 4xx errors are not being reported back to theClaus Aßmann

1
can it be that 4xx errors are not being reported back to the client?

<t278ge$3qu$1@dont-email.me>

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Path: i2pn2.org!i2pn.org!eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: hzcnjkx656@tormails.com (None)
Newsgroups: comp.mail.sendmail
Subject: can it be that 4xx errors are not being reported back to the client?
Date: Fri, 1 Apr 2022 18:16:13 +0200
Organization: A noiseless patient Spider
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logging-data="3934"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1974QzAqTu4YheNZBkXkZrJjWsL4Lk1mgU6TnSgb2UjlA=="
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Content-Language: en-US
 by: None - Fri, 1 Apr 2022 16:16 UTC

When I reject messages with a 5xx code and error text, the sender is
most of the time being notified and given the error text.
It looks like the 4xx is not being relayed back to the sender (probably
because the server is instructed to try again later)

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

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

<t279rp$91v$1@news.misty.com>

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From: INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org (Claus Aßmann)
Newsgroups: comp.mail.sendmail
Subject: Re: can it be that 4xx errors are not being reported back to the client?
Date: Fri, 1 Apr 2022 12:39:21 -0400 (EDT)
Organization: MGT Consulting
Sender: <ml+sendmail(-no-copies-please)@esmtp.org>
Message-ID: <t279rp$91v$1@news.misty.com>
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X-Newsreader: trn 4.0-test77 (Sep 1, 2010)
Originator: ca@x2.esmtp.org (Claus Assmann)
 by: Claus Aßmann - Fri, 1 Apr 2022 16:39 UTC

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.

--
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.

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

<t29qao$n30$1@dont-email.me>

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From: hzcnjkx656@tormails.com (None)
Newsgroups: comp.mail.sendmail
Subject: Re: can it be that 4xx errors are not being reported back to the
client?
Date: Sat, 2 Apr 2022 17:32:39 +0200
Organization: A noiseless patient Spider
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logging-data="23648"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19r6kb1X+N+NB0NzfoAuOZv+rMhf2YgEgc4Z3KdJqR51g=="
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Content-Language: en-US
 by: None - Sat, 2 Apr 2022 15:32 UTC

>
>> 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?

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

<t2bguq$flq$1@news.misty.com>

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From: INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org (Claus Aßmann)
Newsgroups: comp.mail.sendmail
Subject: Re: can it be that 4xx errors are not being reported back to the
client?
Date: Sun, 3 Apr 2022 03:04:58 -0400 (EDT)
Organization: MGT Consulting
Sender: <ml+sendmail(-no-copies-please)@esmtp.org>
Message-ID: <t2bguq$flq$1@news.misty.com>
References: <t278ge$3qu$1@dont-email.me> <t279rp$91v$1@news.misty.com> <t29qao$n30$1@dont-email.me>
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logging-data="16058"; mail-complaints-to="abuse@misty.com"
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X-Newsreader: trn 4.0-test77 (Sep 1, 2010)
Originator: ca@x2.esmtp.org (Claus Assmann)
 by: Claus Aßmann - Sun, 3 Apr 2022 07:04 UTC

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.

1
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