Rejecting Mail From Palsu

#nano  /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf

tambahkan check_sender_access hash:/opt/zimbra/conf/domainrestrict

#nano  /opt/zimbra/conf/domainrestrict

localdomain.com   REJECT You're not me!
anotherlocaldomain.com REJECT You're not me!

#/opt/zimbra/postfix/sbin/postmap  /opt/zimbra/conf/domainrestrict

#su zimbra

$zmmtactl stop

$zmmtactl start 

Done now test it :D

#telnet yourdomain.com 25 

HELO yourdomain.com 

mail from: user@localdomain.com 

rcpt to: user2@yourdomain.com 

554 5.7.1 <user@localdomain.com>: Sender address rejected: You're not me!

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Blocking Domain Sender ZImbra Configure

#nano /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf 

Tambahkan hash:/opt/zimbra/postfix/conf/reject

# nano /opt/zimbra/postfix/conf/reject 

namadomaian.com REJECT

#/opt/zimbra/postfix/sbin/postmap /opt/zimbra/postfix/conf/reject 

#su zimbra

 $zmmtactl stop && zmmtactl start

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Delete Queue Postfix With Spesific

Buat File Dengan nama delete.pl dengan isi sebagai berikut

#!/usr/bin/perl

$REGEXP = shift || die "no email-adress given (regexp-style, e.g. bl.*\@yahoo.com)!";

@data = qx</usr/local/sbin/postqueue -p>;
for (@data) {
  if (/^(\w+)(\*|\!)?\s/) {
     $queue_id = $1;
  }
  if($queue_id) {
    if (/$REGEXP/i) {
      $Q{$queue_id} = 1;
      $queue_id = "";
    }
  }
}

#open(POSTSUPER,"|cat") || die "couldn't open postsuper" ;
open(POSTSUPER,"|postsuper -d -") || die "couldn't open postsuper" ;

foreach (keys %Q) {
  print POSTSUPER "$_\n";
};
close(POSTSUPER);

 Lalu berikan permisi bisa dengan chmod 7777 or chmod -x

chmod 7777 delete.pl

 Jalan kan dengan cara sebagai berikut

delete.pl namedomain.com

 Jika Ingin menghapus dengan status Deferred

postsuper -d ALL deferred

 Jika Ingin menghapus semua queue mail di postfix

postsuper -d ALL

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Installing Casandra On Linux Mint Olivia

Pasti pada nanya cewe siapa itu namanya olivia sama casandra :p

Okey to the point aja ...

Edit sourcelistnya dulu

nano /etc/apt/sources.list

Tambahakan 

deb http://www.apache.org/dist/cassandra/debian 10x main  
deb-src http://www.apache.org/dist/cassandra/debian 10x main  

Jika Muncul Error 

GPG error: http://www.apache.org unstable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4BD736A82B5C1B00    

Fix dengan 

gpg --keyserver wwwkeys.pgp.net --recv-keys 4BD736A82B5C1B00  
sudo apt-key add ~/.gnupg/pubring.gpg  
sudo apt-get update     

Setelah Itu 

apt-get install cassandra

Jika Muncul Eror Download Manual Casandranya 

wget https://archive.apache.org/dist/cassandra/debian/pool/main/c/cassandra/cassandra_1.0.12_all.deb;
dpkg -i cassandra_1.0.12_all.deb

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Blocking Junker Mail From Postfix

Belakangan ini server di block ISP terus karena di tuduh mengunakan spam, awalnya gw pikir orang scan scan dan masuk ke banyakan email, setelah gw liat ternyata bener ada spammer yang mengunakan smptpnya.

Kejadiannya Mail Queue gw dah sampe 20.000 an dan setiap dari firewall isp di realse kembali tetep aja selalu ke block lagi akhirnya gw coba hapus queuenya dengan command

/opt/zimbra/postfix/sbin/postsuper -d ALL

Dan sesudah itu kembali gw check ternyata masih banyak saja emailnya dan emailnya itu secara acak , jadi gw berkesimpulan ini kerjaan spammer pake smtp relay server gw. dan akhirnya gw block lagi

### SMTP Restrictions
smtpd_client_restrictions = permit_mynetworks,
                                reject_invalid_hostname,
                                reject_rbl_client zen.spamhaus.org,
                                reject_unknown_client,
                                permit

smtpd_helo_restrictions = permit_mynetworks,
                                check_helo_access hash:/etc/postfix/helo_access,
                                reject_unauth_pipelining,
                                reject_non_fqdn_hostname,
                                reject_invalid_hostname,
                                warn_if_reject reject_unknown_hostname,
                                permit

smtpd_recipient_restrictions =  reject_non_fqdn_sender,
                                reject_non_fqdn_recipient,
                                reject_non_fqdn_hostname,
                                reject_invalid_hostname,
                                permit_mynetworks,
                                reject_unauth_pipelining,
                                reject_unknown_sender_domain,
                                reject_unknown_recipient_domain,
                                reject_unauth_destination,
                                reject_unknown_client,
                                permit

smtpd_sender_restrictions =  permit_mynetworks,
                                reject_non_fqdn_sender,
                                reject_unknown_sender_domain,
                                reject_unknown_address

smtpd_etrn_restrictions = permit_mynetworks,
                                reject

smtpd_data_restrictions = reject_unauth_pipelining,
                                reject_multi_recipient_bounce,
                                permit

#####################  END  #####################################################

 Dan gw coba minta orang ISP nya untuk merealsenya kembali and work great !!

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