Auditoria de e-mails com desempenho e segurança em um só produto. O HSC MailInspector® é um Gateway de E-mails padrão SMTP que foi desenvolvido para prover. Antivirus and anti-spam protection are the among the most important security features for a mail server. Unix/Linux based mail servers are typically invulnerable to. Kerio Connect is a commercial mail and groupware server developed by Kerio Technologies. It runs on Windows, Linux and OS X. The product was named Kerio MailServer. Issue. Remove an antivirus program that was installed on your computer before you install ESET. Firewall güvenlik duvarı network koruma hakında her şey ucretsiz hizmetler sunan online yardım sitesidir. GFI MAX MailProtection™ is our comprehensive hosted anti-spam, email security and continuity service for IT Support and Managed Services Providers (MSPs) which is. Antivirus Rollout. Replaced McAfee with Sophos Anti-Virus on 285 computers, primarily through the Sophos Enterprise Console. In the world of mail servers, MailScanner is one of the best open source software for virus scanning and spam detection. MailScanner relies on pre-installed anti. Adquira nossa solução de email corporativo, o Zimbra email. Conheça mais suas qualidades, como caixa de correio inteligente, aplicativos corporativos e mais! How to set up Clam Antivirus, Spam. Assassin and Mail. Scanner on Ubuntu mail server. Antivirus and anti- spam protection are the among the most important security features for a mail server. Unix/Linux based mail servers are typically invulnerable to malware and viruses, and there is a very slim chance that the server itself may get infected. On the other hand, the operating system of an end user device may not always be so secured. We certainly do not want our mail server to accept or distribute malware embedded emails. So setting up antivirus software on a mail server is a must. Anti spam filters will inspect every incoming and outgoing mail for patterns of spamming. For example, spam mails usually contain a large number of recipients. Also, reverse DNS query for the domain in a spam mail does not always provide proper answers. If the spam filter software finds any mail that could be spam, it blocks the mail. This helps retaining the reputation of the mail server, as well as prevents the IP address of the mail server from being blacklisted. In this tutorial, we will be looking at how to secure our mail server on Ubuntu by setting up: Clam Antivirus: open- source antivirus engine. Spam. Assassin: e- mail spam filtering engine. Mail. Scanner [version_4. This tutorial is version specific. As of this writing, Mail. Scanner is not available in the Ubuntu repository. So we will be using the Mail. Scanner . deb package instead. Unfortunately, the dependency packages required for the latest version of Mail. Scanner [4. 7. 9. Ubuntu repository either. However, the dependency packages for version 4. Thus, we will be using Mail. Scanner [4. 7. 9. Ubuntu 1. 2. 0. 4 is used for testing. For those of you who are interested in setting it up on Cent. OS, refer to this tutorial instead. Installing Dependencies on Ubuntu. Before starting doing anything on Ubuntu, the first thing to do is be to install all the necessary dependencies. The list of dependencies is long, but luckily it can be done using one command. Installing Clam Antivirus and Spam. Assassin. Now that the dependencies are installed, Clam Antivirus and Spam. Assassin can be installed using apt- get. Spam. Assassin has to be enabled, and then started. After the packages are installed, they can be updated using the following commands. Installing Mail. Scanner. After all the software that Mail. Scanner depends on has been installed, we will download the . Mail. Scanner version 4. Configuring Mail. Scanner. Now it is time to adjust the parameters of Mail. Scanner. First of all, the directory for Spam. Assassin is created and permission for that directory is adjusted. Mail. Scanner/spamassassin# chown postfix /var/spool/Mail. Scanner/spamassassin. The configuration file /etc/Mail. Scanner/Mail. Scanner. Mail. Scanner/Mail. Scanner. conf. %org- name% = test Ubuntu mail server. Your Organization Name Here. Run As User = postfix. Run As Group = postfix. Incoming Queue Dir = /var/spool/postfix/hold. Outgoing Queue Dir = /var/spool/postfix/incoming. Virus Scanners = clamav. Spam List = SBL+XBL. Mail. Scanner/spam. Spam. Assassin User State Dir = /var/spool/Mail. Scanner/spamassassin. More information about the configuration file parameters can be found in the official documentation. Postfix configuration file is modified as well. We will configure Postfix to hold off any mails. Mail. Scanner will swoop in, and check those emails. Then the mails will be handed over to Postfix again for delivery. Here is how the configurations are modified. Received: / HOLD. Mail. Scanner is enabled by un- commenting the following line. Finally, Postfix and Mail. Scanner services are started. Testing Mail. Scanner. Now that Mail. Scanner has been deployed, we can test its functionality by monitoring the mail log. Let us send a test mail and see what happens. Mar 3 0. 2: 4. 6: 3. Mar 3 0. 2: 4. 6: 3. E5. F3. C4. 4FB1: client=localhost[1. LOGIN, sasl_username=sarmed. Mar 3 0. 2: 4. 6: 3. E5. F3. C4. 4FB1: hold: header Received: from [server_ip] (localhost [1. Postfix) with ESMTPA id E5. F3. C4. 4FB1?? for < sarmed@example. Mon, 3 Mar 2. 01. BDT) from localhost[1. ESMTP helo=< [server_ip]>. Mar 3 0. 2: 4. 6: 3. E5. F3. C4. 4FB1: message- id=< b. Mar 3 0. 2: 4. 6: 4. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Mail. Scanner E- Mail Virus Scanner version 4. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Read 8. 48 hostnames from the phishing whitelist. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 15. New Batch: Scanning 1 messages, 2. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Read 4. 27. 8 hostnames from the phishing blacklist. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Using Spam. Assassin results cache. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Connected to Spam. Assassin cache database. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Enabling Spam. Assassin auto- whitelist functionality.. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 16. Using locktype = flock. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 15. Virus and Content Scanning: Starting. Mar 3 0. 2: 4. 6: 4. Mail. Scanner[3. 15. Requeue: E5. F3. C4. FB1. 2. 83. A6 to 1. B8. 34. 4FB3. Mar 3 0. Mail. Scanner[3. 15. Uninfected: Delivered 1 messages. Mar 3 0. 2: 4. 6: 4. B8. 34. 4FB3: from=< sarmed@example. Mar 3 0. 2: 4. 6: 4. B8. 34. 4FB3: to=< sarmed@example. Mar 3 0. 2: 4. 6: 4. B8. 34. 4FB3: removed. The summary of the log is provided below. Postfix held the email after the SMTP connection. The email was placed in /var/spool/postfix/hold. Mail. Scanner scanned the email: (1) spam- check from blacklist, (2) spam- check from spamassassin online database, and (3) virus and content scanning. Mail. Scanner changed the queue ID for the email. After the mail was found clean, it was handed over to Postfix with the new queue ID. Postfix delivered the email to destination account. To sum up, Mail. Scanner integrated with Clam Antivirus and Spam. Assassin is a very powerful tool, and is a must for production mail servers. It can fend off exploitation of most existing mail server vulnerabilities. This tutorial covers the minimum configuration for securing a mail server using Mail. Scanner. The parameters of Mail. Scanner, Clam Antivirus and Spam. Assassin are highly customizable, and can be modified to meet different requirements.
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