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Re: SPAM with Reply-To and DSN notify [message #136495 is a reply to message #136490] Thu, 17 August 2017 17:30 Go to previous messageGo to next message
atomitech
Messages: 9
Registered: August 2011
Sounds right. Thanks for taking the time out to test.


With regard including system msgs (like DSN, AV warnings, etc..) into the global msg filter, if occurred to me that could come with risks of creating a message loop with certain actions (such as forwarding the email to a local user and then matching on the same conditions, perhaps if only a subject match is used). That sort of potential complication could be why they were left off originally Smile

A safer/simpler approach might be to provide 2 tick boxes in the appropriate places. One to disable DSN (server delivery notification) for all messages associated to a domain, and the other to disable DSN's only for those messages detected as spam or failing any other security checks. (Although the later arguably might be best as the default behaviour anyhow, without need for a tickbox; and seemingly it almost is, just that those msgs classified as spam -but not blocked as spam- are not having the DSN's discarded).


OK, time to clear the mind of all this, and look forward to a possible future improvement.

Many thanks again Brian.
Great support as always.

[Updated on: Thu, 17 August 2017 17:30]

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Re: SPAM with Reply-To and DSN notify [message #137646 is a reply to message #136314] Thu, 09 November 2017 12:34 Go to previous messageGo to next message
paul_jcs is currently offline  paul_jcs
Messages: 1
Registered: November 2017
Hi

Did this ever get resolved?

I have a client running Kerio Connect 9.2.2 Patch 1. They are currently blacklisted on Barracuda but the only strange behaviour or the DSN report emails in the Message Queue.

The server has the same "Report: autoreply, User: Global deliver rule" in the Mail log for every email in the Message Queue.

Is there a way to disable DSN either in the web admin or mailserver.cfg file?
Re: SPAM with Reply-To and DSN notify [message #139958 is a reply to message #137646] Thu, 24 May 2018 13:16 Go to previous messageGo to next message
damjanh is currently offline  damjanh
Messages: 4
Registered: November 2011
I have the same trouble.
mail_report.cpp: Cannot open report file 'dsn-success' in language
Re: SPAM with Reply-To and DSN notify [message #140162 is a reply to message #136490] Wed, 13 June 2018 13:39 Go to previous messageGo to next message
guyhemmings is currently offline  guyhemmings
Messages: 2
Registered: February 2014
Have we a solution for the inability to DSNs going out from the KC server yet? As we know now, no method of rules is able to control the process.

The forum entry is 9 months old and there appears to be no update...

Guy
Re: SPAM with Reply-To and DSN notify [message #140164 is a reply to message #136417] Wed, 13 June 2018 13:43 Go to previous messageGo to next message
guyhemmings is currently offline  guyhemmings
Messages: 2
Registered: February 2014
Has anyone any news on this one. I can find no solution to stop KC from sending DSNs, and the question here seems unanswered after 9 months! Not looking good. The twitter feed does get any responses to queries, only seems to contain adverts from GFI for KC.

:-/

Guy


RadimAdmin wrote on Tue, 08 August 2017 21:29
Hi Brian,

we are not forwarding messages to any backend systems.

This issue is with delivery status messages to messages originally MARKED as possible SPAM, not REJECTED as SPAM. There are two threshold settings in SPAM section.

Secondary problem is: spammers are harvesting real addresses using DSN, because DSN to these messages contains real addresses, not aliases.

I think adding a funtionality to disable DSN for messages MARKED as possible spam might solve this issue. And of course adding possiblity to reject messages from domain without valid (or any) MX records. I am unaware of any legit mail from domain with A record only (without MX record).

Support ticket already posted, here is the progress:
1. asking for license number - SENT
2. waiting for 2 days
3. asking for logs and messages samples - SENT
4. waiting for 3 days for answer...

Re: SPAM with Reply-To and DSN notify [message #144804 is a reply to message #136314] Tue, 15 January 2019 14:40 Go to previous messageGo to next message
mik256 is currently offline  mik256
Messages: 11
Registered: April 2016
Same problem here, just got listed in SORBS.
270 messages in queue with:
From: <>
Sender-IP: 127.0.0.1
target address: totally random

I guess it's the DSN issue. Need some solution asap!
Re: SPAM with Reply-To and DSN notify [message #144905 is a reply to message #144804] Mon, 28 January 2019 10:15 Go to previous messageGo to next message
Adiizo later is currently offline  Adiizo later
Messages: 4
Registered: January 2019
Location: cambodai
Is there anything I can do to get this working?
Re: SPAM with Reply-To and DSN notify [message #144906 is a reply to message #144804] Mon, 28 January 2019 10:16 Go to previous messageGo to next message
Adiizo later is currently offline  Adiizo later
Messages: 4
Registered: January 2019
Location: cambodai
I sure will look for other reasons why the filter on those messages doesn't get actioned.
Re: SPAM with Reply-To and DSN notify [message #144908 is a reply to message #144906] Mon, 28 January 2019 13:04 Go to previous message
mik256 is currently offline  mik256
Messages: 11
Registered: April 2016
I don't think you can do anything about this. Filters won't help you. You can only delete queue from time to time and hope these DSNs won't be abused to blacklist you somewhere.
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