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-   -   Empty Messages with SpamSNAKE (http://www.howtoforge.com/forums/showthread.php?t=32195)

jshampur 6th March 2009 18:35

Empty Messages with SpamSNAKE
 
Hi,

I went through the entire install process except for the PDF and image scanning parts of it. The entire system worked wonderfully for about three months, then last week some users started getting blank messages with the MailScanner signature and nothing else.

Since I administer this box, and no one else has access, I know that nothing was modified by any carbon based life forms. Nothing was upgraded, no config changed - nothing.

After some digging around, I changed one settings in /etc/MailScanner.conf from Lock Type = posix to Lock Type = flock - no luck.

At the moment, the Scan Messages = No so that incoming mail is at least delivered.

Oh, it is running on Ubuntu 8.0.4

Any ideas?

Thanks, Jay

Rocky 6th March 2009 19:10

Hey,

Thats a very weird problem you're having. You said it worked for 3 months and then started doing this?

I've been running mine since this guide was posted, but never had any such development.

Do you see the mails coming in through the mailwatch interface? Also, are there any errors in your mail.log while this problem is taking place? Post your mail.log, atleast the last section of it so that I can take a look. Also, post your main.cf and master.cf files.

Thanks,

Rocky

jshampur 9th March 2009 19:50

Hi,

I could not see any errors in the log when it happened, and the relevant mailwatch log entry indicated that the message was the right size and was delivered.

We have verified the following:

- Not attachment specific - at various times attachments of every kind were stripped along with the content. The message sent a few minutes later was delivered fine.

- Not recipient specific - different recipients of completely different messages reported the issue.

- Not sender specific

- Once I set the Scan Messages to No, the problems went away, but that defeats the whole purpose, no?

Basically, I have not been able to establish a pattern.


Here is my master.cf
-------
#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ================================================== ========================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ================================================== ========================
smtp inet n - - - - smtpd
#submission inet n - - - - smtpd
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticate d,reject
# -o milter_macro_daemon_name=ORIGINATING
#smtps inet n - - - - smtpd
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticate d,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - - - - qmqpd
pickup fifo n - - 60 1 pickup
-o content_filter=
-o receive_override_options=no_header_body_checks
cleanup unix n - - - 0 cleanup
qmgr fifo n - n 300 1 qmgr
#qmgr fifo n - - 300 1 oqmgr
tlsmgr unix - - - 1000? 1 tlsmgr
rewrite unix - - - - - trivial-rewrite
bounce unix - - - - 0 bounce
defer unix - - - - 0 bounce
trace unix - - - - 0 bounce
verify unix - - - - 1 verify
flush unix n - - 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - - - - smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - - - - smtp
-o smtp_fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - - - - showq
error unix - - - - - error
retry unix - - - - - error
discard unix - - - - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - - - - lmtp
anvil unix - - - - 1 anvil
scache unix - - - - 1 scache
#
# ================================================== ==================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ================================================== ==================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
-------------

Here is main.cf

# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (SHC)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = esafe2.sherbourne.on.ca
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = sherbourne.on.ca
mydestination =
relayhost =
mynetworks = 127.0.0.0/8, 192.168.0.0/20, 192.168.10.0/24
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
message_size_limit = 10485760
local_transport = error:No local mail delivery
local_recipient_maps =
virtual_alias_maps = hash:/etc/postfix/virtual
relay_recipient_maps = hash:/etc/postfix/relay_recipients
transport_maps = hash:/etc/postfix/transport
relay_domains = hash:/etc/postfix/relay_domains
smtpd_helo_required = yes
# smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access, reject_unknown_sender_domain
smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_non_fqdn_recipient, reject_unknown_recipient_domain, permit_mynetworks, reject_unauth_destination, reject_unauth_pipelining, reject_rbl_client zen.spamhaus.org
smtpd_data_restrictions = reject_unauth_pipelining
header_checks = regexp:/etc/postfix/header_checks
disable_dns_lookups = yes

Rocky 11th March 2009 19:12

Can you also share your mailscanner.conf file. I'd like to see if there are any misconfigurations.

jshampur 12th March 2009 21:03

1 Attachment(s)
Hi,

I've attached the MailScanner.conf

Thanks.

Rocky 1st May 2009 18:57

Hey,

Make sure the following line looks like the below in MailScanner.conf:

"Quarantine Whole Messages As Queue Files = no"

Thanks,

Rocky

jshampur 8th May 2009 20:48

Yep, that is how I have it.

Thanks.


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