http://www.cyberciti.biz/tips This is a Linux sys admin journal by Vivek about sys admin work, Linux tips & tricks, hacks, news and more. Wed, 24 Apr 2013 18:50:55 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 http://www.cyberciti.biz/tips/postfix-mail-server-security-update-moderate-security-impact.html http://www.cyberciti.biz/tips/postfix-mail-server-security-update-moderate-security-impact.html#comments Mon, 18 Aug 2008 22:10:28 +0000 nixCraft http://www.cyberciti.biz/tips/?p=2703 Postfix MTA updated to fix security vulnerabilities such as incorrectly checks the ownership of a mailbox. In some configurations, this allows for appending data to arbitrary files as root. This update has been rated as having moderate security impact.]]> http://www.cyberciti.biz/tips/postfix-mail-server-security-update-moderate-security-impact.html/feed 0 http://www.cyberciti.biz/tips/howto-postfix-flush-mail-queue.html http://www.cyberciti.biz/tips/howto-postfix-flush-mail-queue.html#comments Thu, 25 Oct 2007 14:09:42 +0000 nixCraft http://www.cyberciti.biz/tips/howto-postfix-flush-mail-queue.html http://www.cyberciti.biz/tips/howto-postfix-flush-mail-queue.html/feed 24 http://www.cyberciti.biz/tips/postfix-smtp-ssl-certificate-csr-installation-guide.html http://www.cyberciti.biz/tips/postfix-smtp-ssl-certificate-csr-installation-guide.html#comments Thu, 12 Jul 2007 19:51:13 +0000 nixCraft http://www.cyberciti.biz/tips/postfix-smtp-ssl-certificate-csr-installation-guide.html In this tutorial yo0u will learn about Installing SSL Certificate (Secure Server Certificate) to secure communication between Postfix SMTP server and mail client such as Outlook or Thunderbird. ]]> http://www.cyberciti.biz/tips/postfix-smtp-ssl-certificate-csr-installation-guide.html/feed 13 http://www.cyberciti.biz/tips/howto-setup-postfix-mail-server-to-block-malware.html http://www.cyberciti.biz/tips/howto-setup-postfix-mail-server-to-block-malware.html#comments Mon, 25 Jun 2007 19:03:06 +0000 nixCraft http://www.cyberciti.biz/tips/howto-setup-postfix-mail-server-to-block-malware.html http://www.cyberciti.biz/tips/howto-setup-postfix-mail-server-to-block-malware.html/feed 10 http://www.cyberciti.biz/tips/postfix-block-mime-attachment-files.html http://www.cyberciti.biz/tips/postfix-block-mime-attachment-files.html#comments Wed, 20 Jun 2007 19:57:44 +0000 nixCraft http://www.cyberciti.biz/tips/postfix-block-mime-attachment-files.html http://www.cyberciti.biz/tips/postfix-block-mime-attachment-files.html/feed 7 http://www.cyberciti.biz/tips/linux-linux-antivirus-antispam-mail-server-configration.html http://www.cyberciti.biz/tips/linux-linux-antivirus-antispam-mail-server-configration.html#comments Wed, 07 Feb 2007 15:00:28 +0000 nixCraft http://www.cyberciti.biz/tips/linux-linux-antivirus-antispam-mail-server-configration.html http://www.cyberciti.biz/tips/linux-linux-antivirus-antispam-mail-server-configration.html/feed 5 http://www.cyberciti.biz/tips/postfix-spam-filtering-with-blacklists-howto.html http://www.cyberciti.biz/tips/postfix-spam-filtering-with-blacklists-howto.html#comments Tue, 09 Jan 2007 12:23:51 +0000 nixCraft http://www.cyberciti.biz/tips/postfix-spam-filtering-with-blacklists-howto.html disable_vrfy_command = yes : Disable the SMTP VRFY command. This stops some techniques used to harvest email addresses. => smtpd_delay_reject = yes : It allows Postfix to log recipient address information [...]]]> http://www.cyberciti.biz/tips/postfix-spam-filtering-with-blacklists-howto.html/feed 11 http://www.cyberciti.biz/tips/linux-unix-windows-send-anonymous-email.html http://www.cyberciti.biz/tips/linux-unix-windows-send-anonymous-email.html#comments Sun, 31 Dec 2006 07:48:28 +0000 nixCraft http://www.cyberciti.biz/tips/linux-unix-windows-send-anonymous-email.html http://www.cyberciti.biz/tips/linux-unix-windows-send-anonymous-email.html/feed 2 http://www.cyberciti.biz/tips/howto-postfix-masquerade-change-email-mail-address.html http://www.cyberciti.biz/tips/howto-postfix-masquerade-change-email-mail-address.html#comments Thu, 28 Dec 2006 10:35:04 +0000 nixCraft http://www.cyberciti.biz/tips/postfix-masquerading-or-changing-outgoing-smtp-email-or-mail-address.html http://www.cyberciti.biz/tips/howto-postfix-masquerade-change-email-mail-address.html/feed 14 http://www.cyberciti.biz/tips/ordborg-rbl-anti-spam-service-going-offline.html http://www.cyberciti.biz/tips/ordborg-rbl-anti-spam-service-going-offline.html#comments Mon, 18 Dec 2006 18:22:26 +0000 nixCraft http://www.cyberciti.biz/tips/ordborg-rbl-anti-spam-service-going-offline.html Bayesian spam filtering => SpamAssassin/DSPAM programs => Check open relay using RBL etc Now ORDB.org is shutting down its operation. ORDB is quite effective and I use this list against all of email servers. Spammers still use 3rd party servers and desktop computers [...]]]> http://www.cyberciti.biz/tips/ordborg-rbl-anti-spam-service-going-offline.html/feed 6 http://www.cyberciti.biz/tips/how-to-set-up-fedora-redhat-linux-email-server.html http://www.cyberciti.biz/tips/how-to-set-up-fedora-redhat-linux-email-server.html#comments Thu, 07 Dec 2006 08:40:37 +0000 nixCraft http://www.cyberciti.biz/tips/how-to-set-up-fedora-redhat-linux-email-server.html http://www.cyberciti.biz/tips/how-to-set-up-fedora-redhat-linux-email-server.html/feed 8 http://www.cyberciti.biz/tips/howto-php-send-email-via-smtp-authentication.html http://www.cyberciti.biz/tips/howto-php-send-email-via-smtp-authentication.html#comments Thu, 30 Nov 2006 19:56:23 +0000 nixCraft http://www.cyberciti.biz/tips/howto-php-send-email-via-smtp-authentication.html If sendmail (or compatible binary) is not installed => If Apache Web server / Lighttpd running in chrooted jail => And your smtp server needs an authentication before sending an email => Or you just need to send [...]]]> http://www.cyberciti.biz/tips/howto-php-send-email-via-smtp-authentication.html/feed 74 http://www.cyberciti.biz/tips/remove-unwanted-mails-from-unix-mailboxes-imap-folders.html http://www.cyberciti.biz/tips/remove-unwanted-mails-from-unix-mailboxes-imap-folders.html#comments Sat, 25 Nov 2006 21:13:58 +0000 nixCraft http://www.cyberciti.biz/tips/remove-unwanted-mails-from-unix-mailboxes-imap-folders.html http://www.cyberciti.biz/tips/remove-unwanted-mails-from-unix-mailboxes-imap-folders.html/feed 0 http://www.cyberciti.biz/tips/sendmail-masquerading-configuration-howto.html http://www.cyberciti.biz/tips/sendmail-masquerading-configuration-howto.html#comments Thu, 02 Nov 2006 18:24:43 +0000 nixCraft http://www.cyberciti.biz/tips/sendmail-masquerading-configuration-howto.html http://www.cyberciti.biz/tips/sendmail-masquerading-configuration-howto.html/feed 17 http://www.cyberciti.biz/tips/linux-iptables-14-how-to-allow-pop3-serverprotocol-request.html http://www.cyberciti.biz/tips/linux-iptables-14-how-to-allow-pop3-serverprotocol-request.html#comments Fri, 22 Jul 2005 13:05:00 +0000 nixCraft http://www.cyberciti.biz/tips/linux-iptables-14-how-to-allow-pop3-serverprotocol-request.html The Post Office Protocol version 3 (POP3) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection.]]> http://www.cyberciti.biz/tips/linux-iptables-14-how-to-allow-pop3-serverprotocol-request.html/feed 7 http://www.cyberciti.biz/tips/sending-mail-with-attachment.html http://www.cyberciti.biz/tips/sending-mail-with-attachment.html#comments Fri, 13 Aug 2004 22:48:00 +0000 nixCraft http://www.cyberciti.biz/tips/sending-mail-with-attachment.html If you need to send an email with a text file (or binary file) as attachment using shell script or command prompt in Unix or Linux; try mutt - a terminal-based e-mail client for Unix-like systems.]]> http://www.cyberciti.biz/tips/sending-mail-with-attachment.html/feed 95