Mailing List Archive: NULL char -> Re: dbmail-lmtpd makes me crazy today

NULL char -> Re: dbmail-lmtpd makes me crazy today

Nov 1, 2014, 12:08 PM

Post #1 of 5 (1583 views)

starting to hang because a NULL char in the body smells security
relevant! however, in don't get the SpamAssassin default score of 1.6

1.6 NULL_IN_BODY FULL: Message has NUL (ASCII 0) byte in message

UPDATED: /etc/mail/spamassassin/local.cf
238a239
> score NULL_IN_BODY 8.0

Am 01.11.2014 um 19:45 schrieb Reindl Harald:
> in fact it was *a single message* driving LMTPD crazy
>
> after try "postfix flush" and "postsuper -r ALL" including a reboot and
> what not else i realized every time when that message got a delivery try
> dbmail-lmtpd started to hang
>
> before delete that crap from the mailqueue i saved it with "postcat" and
> will send the file to Paul offlist, looks like some crap after the
> spam message
>
> Am 01.11.2014 um 18:51 schrieb Reindl Harald:
>> starting somewhere yesterday dbmail-ltmpd decides to timeout randomly,
>> or better said after it happend once it affects also following deliveries
>>
>> see attached logfiles including lmtpd log level 511
>> _________________________________________
>>
>> i am somehow out of ideas and tried disable the following also with no
>> luck, a few seconds ago the next forced re-queue ended in "delivery
>> temporarily suspended" :-(
>>
>> auto_reply = no
>> suppress_duplicates = no
>> sieve = no
>> _________________________________________

Re: NULL char -> Re: dbmail-lmtpd makes me crazy today [ In reply to ]

paul at nfg

Nov 2, 2014, 6:15 AM

Post #2 of 5 (1562 views)

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On 01-11-14 20:08, Reindl Harald wrote:
> starting to hang because a NULL char in the body smells security
> relevant! however, in don't get the SpamAssassin default score of 1.6

Cool! I'll look into it.

--
________________________________________________________________
Paul J Stevens pjstevns @ gmail, twitter, github, linkedin
www.nfg.nl/info@nfg.nl/+31.85.877.99.97
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DBmail mailing list
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Re: NULL char -> Re: dbmail-lmtpd makes me crazy today [ In reply to ]

mysql.jorge at decimal

Nov 7, 2014, 4:31 AM

Post #3 of 5 (1561 views)

Permalink

Hi Reindl,

I think I'm hitting this :)
How did you found the problematic messages in queue?

> -----Original Message-----
> From: dbmail-bounces@dbmail.org [mailto:dbmail-bounces@dbmail.org] On
> Behalf Of Paul J Stevens
> Sent: domingo, 2 de Novembro de 2014 14:16
> To: DBMail mailinglist
> Subject: Re: [Dbmail] NULL char -> Re: dbmail-lmtpd makes me crazy
> today
>
>
>
> On 01-11-14 20:08, Reindl Harald wrote:
> > starting to hang because a NULL char in the body smells security
> > relevant! however, in don't get the SpamAssassin default score of 1.6
>
> Cool! I'll look into it.
>
>
> --
> ________________________________________________________________
> Paul J Stevens pjstevns @ gmail, twitter, github, linkedin
> www.nfg.nl/info@nfg.nl/+31.85.877.99.97
> _______________________________________________
> DBmail mailing list
> DBmail@dbmail.org
> http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail

_______________________________________________
DBmail mailing list
DBmail@dbmail.org
http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail

Re: NULL char -> Re: dbmail-lmtpd makes me crazy today [ In reply to ]

h.reindl at thelounge

Nov 7, 2014, 4:42 AM

Post #4 of 5 (1556 views)

Permalink

Am 07.11.2014 um 13:31 schrieb Jorge Bastos:
> I think I'm hitting this :)
> How did you found the problematic messages in queue?

by "postsuper -r ALL && postfix flush" for hours and see delivery croak
always after the same message while sometimes a few others got delivered
and using "postcat" too look in that damned message and saved the output

"kate" (KDE editor) showed a lot of crap after the spam message

"postqueue -p" maybe your friend - watch for senders ending with .cn

>> -----Original Message-----
>> From: dbmail-bounces@dbmail.org [mailto:dbmail-bounces@dbmail.org] On
>> Behalf Of Paul J Stevens
>> Sent: domingo, 2 de Novembro de 2014 14:16
>> To: DBMail mailinglist
>> Subject: Re: [Dbmail] NULL char -> Re: dbmail-lmtpd makes me crazy
>> today
>>
>>
>>
>> On 01-11-14 20:08, Reindl Harald wrote:
>>> starting to hang because a NULL char in the body smells security
>>> relevant! however, in don't get the SpamAssassin default score of 1.6
>>
>> Cool! I'll look into it

Re: NULL char -> Re: dbmail-lmtpd makes me crazy today [ In reply to ]

h.reindl at thelounge

Nov 7, 2014, 4:46 AM

Post #5 of 5 (1564 views)

Permalink

Am 07.11.2014 um 13:42 schrieb Reindl Harald:
> Am 07.11.2014 um 13:31 schrieb Jorge Bastos:
>> I think I'm hitting this :)
>> How did you found the problematic messages in queue?
>
> by "postsuper -r ALL && postfix flush" for hours and see delivery croak
> always after the same message while sometimes a few others got delivered
> and using "postcat" too look in that damned message and saved the output
>
> "kate" (KDE editor) showed a lot of crap after the spam message
>
> "postqueue -p" maybe your friend - watch for senders ending with .cn

if you missed it - there are 2 postfix options to strip away such chars
or even reject the message to prevent happening that again until theres
a dbmail fix and frankly i use that now everywhere

submission servers:
message_strip_characters = \0

inbound MTA:
message_reject_characters = \0

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