Dotaz: Mazani spamu a chliv v mqueue (sendmail/spamassassin/procmail)

[RaFo]

Ahoj,

rozdelim svuj dotaz na dve casti:

 Prvni:

 spamassassinem si znackuji maily a pokud jsou "X-Spam-Status: Yes", procmailem je davam do souboru v /home/username/mail/spam.

 A ted se snazim vymyslet, aby v souboru /home/username/mail/spam lezely jen tyden stare spamy a ostatni bych chtel nejakym nastrojem/skriptem odmazavat.

Druha:

v mailove fronte se mi hromadi nejake smeti a ja netusim odkud a co snim.

Vzorek:

Jul 11 16:11:19 fw sendmail[10647]: o6BFRhtB006916: to=<ella@mbox.vol.cz.com>, delay=00:43:35, xdelay=00:01:00, mailer=esmtp, pri=211927, relay=mbox.vol.cz.com. [38.106.39.181], dsn=4.0.0, stat=Deferred: Con
Jul 11 16:11:35 fw sendmail[3745]: o6AJPZqg006826: to=<ksskiracer@thelavendercompany.co.uk>, delay=20:45:59, xdelay=00:01:01, mailer=esmtp, pri=212962, relay=thelavendercompany.co.uk. [212.124.194.124], dsn=
Jul 11 16:12:20 fw sendmail[10647]: o6BF7Xte004004: to=<edpzignak@rheumy.com>, delay=01:04:43, xdelay=00:01:01, mailer=esmtp, pri=211929, relay=rheumy.com. [82.98.86.166], dsn=4.0.0, stat=Deferred: Connectio
Jul 11 16:12:20 fw sendmail[10647]: o6BFLe1x005798: to=<elektronik@canlitvizle.net>, delay=00:50:39, xdelay=00:00:00, mailer=esmtp, pri=211929, relay=canlitvizle.net. [84.16.235.210], dsn=4.0.0, stat=Deferre
Jul 11 16:12:26 fw sendmail[11200]: o6BGCLva011194: to=<klee@weblog.ohmynews.com>, delay=00:00:02, xdelay=00:00:01, mailer=esmtp, pri=121730, relay=weblog.ohmynews.com. [211.233.70.170], dsn=4.0.0, stat=Defe
Jul 11 16:12:31 fw sendmail[11132]: o6BGBTwZ011129: to=<a.gomez@sunterra.com>, delay=00:01:01, xdelay=00:01:00, mailer=esmtp, pri=154764, relay=sunterra.com. [216.115.75.89], dsn=4.0.0, stat=Deferred: Connec
Jul 11 16:12:35 fw sendmail[3745]: o6BF6tmU003745: to=<paunchierhq@rightsideadvisors.com>, delay=00:01:00, xdelay=00:01:00, mailer=esmtp, pri=34166, relay=mail.rightsideadvisors.com. [64.70.26.195], dsn=4.0.Diky za pripadne info

Diky za pomoc

RaFo

Odpovědi

[Petr Šobáň]

Napsat si skript s find a rm, (najít v té složce staré spamy a smazat) a dát si to do cronu a spouštět jednou denně ?

Nastavit správně mail server aby nebyl openrelay a přijímal maily pouze od prověřených PC, zablokovat port 25 ven z vaší sítě kromě vašeho SMTP serveru aby vás uživatelé nemohly obcházet.

[RaFo]

Diky za reakci,

skript: problem je v tom, ze \home\username\mail\spam to spam je "jeden soubor", ktery obsahuje haldu mailu a "ne slozka", kde ja kazdy mail(spam)jako jeden soubor.(take jsem si myslel, ze se bude na netu valet neco hotoveho, ale nevim jak specifikovat dotaz pro googla a preci nejsem jediny na svete, kdo chce mazat spamy )

 

open relay: asi/snad "uplne nebudu", protoze 1) bych byl stale na black listech a to nejsem. 2)port 25 mam zablokovany. 3)pokud by byl nekdo ochotny odkontrolovat muj sendmail.mc byl bych moc vdecny.

RaFo

[komodo]

Co se prvniho dotazu tyce, urcite je toho vic, sice pouzivame maildir ale kdyz si zadate do googlu tak vam vyleze treba tohle.

[RaFo]

Acho jo, protoze plavu v konfiguraci sendmailu, tak poprosim nejakou vstricnou dusi o pomoc.

Takze co resim.

Mam sendmail, ktery standardne odesial postu, ale ve  /var/spool/mqueue se hromadi maily, ktere se s hlaskou "Deferred: Connection timed out with nejaka.domena.ru(.it,.com,.co.uk proste ruzne)" neodesilaji a jsou spam. A ja si nejsem jisty, jestli nejsem napul open relay.

Moje predstava:

- Nechci aby ve /var/spool/mqueue byl chliv

- Nechci byt open relay

- Potrebuju, aby bylo mozne posilat postu z vnitrni site, ale i z venku.

Co jsem udelal:

- Zablokoval jsem port 25 v iptables z vnitrni site

- Upgradnul jsem sendmail na verzi 8.14.3, konfigurace V10/Berkeley

- Rozbehl jsem  SSL sifrovani  (http://www.projektfarm.com/en/support/howto/sendmail_smtp_auth_tls/sendmail_smtp_auth_tls.html)

To se na 99% povedlo. Proc na 99%? Kdyz na serveru dam telnet localhost 25, ehlo localhost, mel bych podle navodu ve vypisu najit 250-STARTTLS a 250-AUTH, ja ve vypisu nemam prave to 250-AUTH.

Diky

Muj sendmail.mc:

divert(-1)dnl
dnl #
dnl # This is the sendmail macro config file for m4. If you make changes to
dnl # /etc/mail/sendmail.mc, you will need to regenerate the
dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf package is
dnl # installed and then performing a
dnl #
dnl #     make -C /etc/mail
dnl #
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for Red Hat Linux')dnl
OSTYPE(`linux')dnl
dnl #
dnl # default logging level is 9, you might want to set it higher to
dnl # debug the configuration
dnl #
define(`confLOG_LEVEL', `9')dnl
dnl #
dnl # Uncomment and edit the following line if your outgoing mail needs to
dnl # be sent out through an external mail server:
dnl #
dnl define(`SMART_HOST',`smtp.your.provider')
dnl #
define(`confDEF_USER_ID',``8:12'')dnl
dnl define(`confAUTO_REBUILD')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST',true)dnl
define(`confDONT_PROBE_INTERFACES',true)dnl
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
define(`confAUTH_OPTIONS', `A p y')dnl
dnl #
dnl # The following allows relaying if the user authenticates, and disallows
dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links
dnl #
dnl define(`confAUTH_OPTIONS', `A p')dnl
dnl # 
dnl # PLAIN is the preferred plaintext authentication method and used by
dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do
dnl # use LOGIN. Other mechanisms should be used if the connection is not
dnl # guaranteed secure.
dnl # Please remember that saslauthd needs to be running for AUTH. 
dnl #
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
dnl #
dnl # Rudimentary information on creating certificates for sendmail TLS:
dnl #     cd /usr/share/ssl/certs; make sendmail.pem
dnl # Complete usage:
dnl #     make -C /usr/share/ssl/certs usage
dnl #
define(`confCACERT_PATH',`/etc/mail/certs')
define(`confCACERT',`/etc/mail/certs/cacert.pem')
define(`confSERVER_CERT',`/etc/mail/certs/sendmail.pem')
define(`confSERVER_KEY',`/etc/mail/certs/sendmail.pem')
define(`confCLIENT_CERT',`/etc/mail/certs/sendmail.pem')
define(`confCLIENT_KEY',`/etc/mail/certs/sendmail.pem')
dnl #
dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's
dnl # slapd, which requires the file to be readble by group ldap
dnl #
dnl define(`confDONT_BLAME_SENDMAIL',`groupreadablekeyfile')dnl
dnl #
dnl define(`confTO_QUEUEWARN', `4h')dnl
dnl define(`confTO_QUEUERETURN', `5d')dnl
dnl define(`confQUEUE_LA', `12')dnl
dnl define(`confREFUSE_LA', `18')dnl
define(`confTO_IDENT', `0')dnl
dnl FEATURE(delay_checks)dnl
FEATURE(`no_default_msa',`dnl')dnl
FEATURE(`smrsh',`/usr/sbin/smrsh')dnl
FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
dnl #
dnl # The following limits the number of processes sendmail can fork to accept 
dnl # incoming messages or process its message queues to 12.) sendmail refuses 
dnl # to accept connections once it has reached its quota of child processes.
dnl #
dnl define(`confMAX_DAEMON_CHILDREN', 12)dnl
dnl #
dnl # Limits the number of new connections per second. This caps the overhead 
dnl # incurred due to forking new sendmail processes. May be useful against 
dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP address 
dnl # limit would be useful but is not available as an option at this writing.)
dnl #
dnl define(`confCONNECTION_RATE_THROTTLE', 3)dnl
dnl #
dnl # The -t option will retry delivery if e.g. the user runs over his quota.
dnl #
FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl
FEATURE(`access_db',`hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
dnl #
dnl # The following causes sendmail to only listen on the IPv4 loopback address
dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
dnl # address restriction to accept email from the internet or intranet.
dnl #
dnl #
dnl # The following causes sendmail to additionally listen to port 587 for
dnl # mail from MUAs that authenticate. Roaming users who can't reach their
dnl # preferred sendmail daemon due to port 25 being blocked or redirected find
dnl # this useful.
dnl #
dnl DAEMON_OPTIONS(`Family=inet, Port=465, Name=MSA-SSL, M=s')dnl
dnl DAEMON_OPTIONS(`Port=submission, Name=MSA-SSL, M=Ea')dnl
dnl #
dnl # The following causes sendmail to additionally listen to port 465, but
dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed
dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't
dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS
dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps
dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1.
dnl #
dnl # For this to work your OpenSSL certificates must be configured.
dnl #
dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
dnl #
dnl # The following causes sendmail to additionally listen on the IPv6 loopback
dnl # device. Remove the loopback address restriction listen to the network.
dnl #
dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl
dnl #
dnl # enable both ipv6 and ipv4 in sendmail:
dnl #
dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6')
dnl #
dnl # We strongly recommend not accepting unresolvable domains if you want to
dnl # protect yourself from spam. However, the laptop and users on computers
dnl # that do not have 24x7 DNS do need this.
dnl #
dnl FEATURE(`accept_unresolvable_domains')dnl
dnl #
FEATURE(`relay_based_on_MX')dnl
dnl # 
dnl # Also accept email sent to "localhost.localdomain" as local email.
dnl # 
LOCAL_DOMAIN(`localhost.localdomain')dnl
dnl #
dnl # The following example makes mail from this host and any additional
dnl # specified domains appear to be sent from mydomain.com
dnl #
dnl MASQUERADE_AS(`mydomain.com')dnl
dnl #
dnl # masquerade not just the headers, but the envelope as well
dnl #
dnl FEATURE(masquerade_envelope)dnl
dnl #
dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well
dnl #
dnl FEATURE(masquerade_entire_domain)dnl
dnl #
dnl MASQUERADE_DOMAIN(localhost)dnl
dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl
dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl
dnl MASQUERADE_DOMAIN(mydomain.lan)dnl
FEATURE(`enhdnsbl', `bl.spamcop.net', `"Spam blocked see: http://spamcop.net/bl.shtml?"$&{client_addr}', `t')
MAILER(smtp)dnl
MAILER(procmail)dnl