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Published : 10.08.2015 | Author : admin | Categories : How To Find Phone Numbers
Use ISA Server and Exchange 2000 to control email Content management is a broader concept than antivirus scanning. The first thing we want to do is configure an A record for our MX record to point to.  The MX record is a type of record which specifies that for a specific domain, you should contact a specific A record to send mail to. You can create this MX record by Right-Clicking our zone and choosing Mail Exchanger (MX) record. The next page has various options that you should go through and configure as you see fit.  One of the options I am configuring is Outbound Mail Server Addresses.
Once we have done this, we will obtain the information to put in our TXT file which we will publish in DNS. We now have our SPF (TXT) Record created which helps people prevent spoofing your domain name in the future.
I leave a leave a response each time I especially enjoy a post on a site or if I have something to contribute to the discussion. The MDaemon Messaging Server is a leader in email security using a layered approach offering proactive protection against email-borne threats of spam, viruses, malware, and phishing. MDaemon includes a powerful spam filter, greylist processing, and features SpamAssassin 3, which uses a wide variety of local and network tests to identify spam signatures to make it harder for spammers to identify a single aspect that they can craft their messages to work around.
When combined with SecurityPlus for MDaemon, MDaemon provides inline Antivirus scanning that helps detect and reject viruses with the least amount of time and effort. Controls what the MDaemon Messaging Server does when a message arrives at your mail server that is neither from nor to a local address. SMTP Authentication provides an option requiring users to authenticate with a username and password when sending mail.
MDaemon's spam Filter supports Bayesian learning, which is a statistical process that can optionally be used to analyze spam and non-spam messages in order to increase the reliability of spam recognition over time.
A highly versatile and fully multi-threaded Content Filtering system makes it possible for you to customize server behavior based on the content of incoming and outgoing email messages.
Sender Policy Framework (SPF) is a security feature that identifies hosts that are authorized to send mail for a specific domain.
IP Shielding allows you to block mail from specific domains from unauthorized IP addresses.
Backscatter occurs when spam or viruses send mail using a forged email address as the return path.
Vouch By Reference (VBR) Certification provides a mechanism through which certification providers may vouch for the email messages sent by others. MDaemon uses all methods of email authentication techniques including DomainKeys Identified Mail (DKIM), Sender Policy (SPF), and DMARC (Domain-Based Message Authentication, Reporting and Conformance) to help message recipients verify the authenticity of the sender. The spam filer blacklist can be used to prevent unwanted mail from email addresses or entire domains.
Messages from addresses or domains on the Whitelist (by sender) or Whitelist (by recipient) will have their spam scores lowered by 100 points, by default.
MDaemon's Spambot Detection feature tracks the originating IP address from which every return-path value (sender) uses over a period of time. With Dynamic Screening (including: Dynamic DoS, Dictionary, and Brute Force Attack Detection and Prevention), you can automatically ban senders who connect more than a given number of times in a given time period, or ban senders who receive a given number of "Recipient unknown" errors. The Dynamic Screening settings can be configured to notify the postmaster after a specified number of failed authentication attempts made by an account. Administrators can perform a variety of tasks via the Account Manager, such as adding or removing accounts, changing passwords, enabling or disabling accounts, configuring autoresponders, and much more. The account listing in MDaemon's Account Manager can be filtered to show all accounts, or only accounts that match specific criteria. Password controls allow administrators to maintain strong password policies in MDaemon (including a minimum length requirement), and to monitor weak password usage. With simple push-button controls, administrators can require all accounts that have a weak password to change their passwords. After running the Lync Server 2013 setup, just like with any previous release, we need to install the Visual C++ Tools.
Choose Step 1 to install the Location Configuration Store.  This will install SQL Express on our Persistent Chat Server which will contain a copy of the Central Management Store which contains a copy of our Topology.
You’ll see the following after the Local Configuration Store has been installed which checks if all server prerequisites are installed and then installs the Local Configuration store (SQL Express) with a copy of the Central Management Store. We’ll now go ahead and start on Step 3 to procure a certificate from our internal CA and the assign the certificate. After specifying all of our options, the Lync Setup process will contact our Online CA to procure the certificate.
In this Part, I will go through the part of the configuration of our Consolidated OCS Edge Server using a separate NIC for each Edge Role. Insert the CD and let’s begin the installation process.  You will be asked to install the Microsoft Visual C++ 2008 Redistributable. You will be asked for Customer Information such as Product Key, Name, and your Organization Name.  Enter them appropriately.
Once you completed the File Installation, you should see the Installation Interface update the Step 1 Status showing as Completed.
When the Activation is finished, Click Finish.  You will be given the option to view the log which I advise you to do to ensure everything went OK.
Once you completed the Activation, you should see the Installation Interface update the Step 2 Status showing as Completed. On the Welcome Screen, you will be prompted with a warning recommending that you stop all OCS Services. We now must configure the IPs and FQDNs for all three Edge Roles.  You can refer to the Excel List above to determine what IPs are associated with which role. We will want to use this Edge Server to allow anonymous users to join meetings as well as enable federation.  If you plan on allowing your users to talk with public IM providers such as AOL, MSN, and Yahoo, select those features as you see fit.
Once you completed the Configuration, you should see the Installation Interface update the Step 3 Status showing as Completed.
I’m going to skip through a lot of this section as it consists of how to obtian a Certificate which I already went through in Part 4 when we discussed configuring our ISA Server. Once you are finished preparing the request, you will see the Step being partially finished.  Click Run again to Continue. You will now want to go through the motions of taking the .Cer file you obtained from your Certificate Authority and binding it to your request. Once you completed the Certificate Configuration, you should see the Installation Interface update the Step 4 Status showing as Completed. I will not be going through the remaining steps.  It consists of Starting Services and Validating your Configuration.
In this Part, I will go over the remaining steps required to deploying our Front End Server in an Enterprise Pool Deployment. We are finally ready to Configure our Enterprise Pool, you can review your Current Settings.  When satisfied, Click Next to Continue.
On the Welcome Screen and Licensing Information (after reading all the licensing information and choosing that you agree if you agree with the licensing terms), Click Next to Continue. The configuration will now commence which will install all of the OCS roles onto this Front End Server due to it being Consolidated Front End. The server will go through a procedure which activates each OCS Server role on our Front End Server.
Because we have an internal CA installed, we can send the request immediately to an online certificate authority. By default, the Certificate Name will be set to your server name.  Change this to the FQDN of the Enterprise Pool.
Since we specified the OCS Certificate Request to send the request immediately to an online certificate authority, OCS will search for an Issuing CA. We should now have our certificate.  Click Assign to ensure that OCS begins to use this certificate. Since we already have a certificate on this Front End Server, we will choose to Assign an existing certificate. The last prompt through this wizard will be for what SSL port to use.  Leave the default at 443. For a list of OCS roles that support 64-bit using Windows on Windows 64 (OCS 32-bit installed on Windows x64), download the OCS planning guide here which I find to be more accurate than the Technet version in regards to 64-bit information. Once these users are created, Right-Click the User and choose Enable users for Communications Server.
I would now go ahead and OCS enable your second user.  Once finished, you can refresh ADUC and verify these users have a Communications Server address. So lots of troubleshooting ensued which involved checking ports, checking connectivity, and several other things. As a side note, for the installation of Exchange 2007, the installer is not intelligent enough to find Server 2003 SP1 Domain Controllers, so you will need to use the command prompt to install Exchange 2007 so you can specify a Server 2003 SP1 Domain Controller. During the reboot, I prayed that Exchange 2007 would come back up normally instead of the usual 2 hour wait. Right click the account that you wish to setup for Interspire, and select Properties from the menu. On the General tab, make sure that your E-mail address matches the sender address you registered with Interspire. Check the box labeled "My server requires authentication" and then click the button that says Settings.


In the field labeled Password, enter the password used to access your Interspire account (i.e.
If you use this option, in the field labeled Password, enter the password you've selected for the respective sender e-mail address. Many organizations, such as Mail Abuse Prevention System (MAPS*) and SpamCop*, provide lists of IP addresses that are known to be open relay hosts or spam hosts.
The Blacklist Addresses list displays the addresses of all blacklists that the Internet Agent checks when it receives a message from another SMTP host. Type the blacklist address in the Address box, then click OK to add the address to the Blacklist Addresses list. If you have multiple blacklists in the Blacklist Addresses list, use the up-arrow and down-arrow to position the blacklists in the order you want them checked. In some cases, a blacklist might contain a host from which you still want to receive messages. You can use the SMTP Incoming Exceptions list on a class of service to override a blacklist.
If you want to block specific hosts yourself rather than use a blacklist (in other words, create your own blacklist), you can configure a class of service that prevents messages from those hosts. You can also create a list of hosts that you always want to allow messages from, so you can create your own white list. Multiple unsolicited messages (sometimes called a mailbomb or spam) from the Internet can potentially harm your GroupWise messaging environment. When this setting is turned on, the Internet Agent refuses messages from a smart host if a DNS reverse lookup shows that a PTR record does not exist for the IP address of the sendera€™s host.
When this setting is turned off, the Internet Agent accepts messages from any host, but display a warning if the initiating host is not authentic.
Based on these samples, examples are provided below of lines that you could add to the list to handle the X-Spam tags found in the MIME headers of messages coming into your system.
This line marks as spam any message whose MIME header contained an X-Spam-Results tag with five or more asterisks. This line marks as spam any message whose MIME header contained the X-Spam-Status tag set to Yes, regardless of the score. These lines marks as spam any message whose MIME header has the X-Spam-Status tag set to Yes and had a score of 9 or 10. You can add as many lines as necessary to the list to handle whatever message tagging your anti-spam service uses. The Internet Agent supports SMTP host authentication for both outbound and inbound message traffic. For outbound authentication to other SMTP hosts, the Internet Agent requires that the remote SMTP hosts support the AUTH LOGIN authentication method. Include the remote SMTP hosta€™s domain name an authentication credentials in the gwauth.cfg file, located in the domain\wpgate\gwia directory. If you have multiple SMTP hosts that require authentication before they accept messages from your system, create an entry for each host. If you choose not to have the Internet Agent reject messages from unidentified hosts, it accepts messages from any host, but it displays a warning if the sendera€™s host is not authentic. This Connector will allow Anonymous Connections (not Relaying) while your Default Receive Connector will be utilized for internal routing.
Could you make a list all of all your social pages like your Facebook page, twitter feed, or linkedin profile? The spam filter can then increase or decrease a message's spam score based upon the results of its Bayesian comparison. MDaemon can query DNS servers to check the validity of the domain names and addresses reported in the headers of incoming messages. You can insert and delete message headers, add footers to messages, remove attachments, route copies to other users, cause an instant message to be sent to someone, run other programs, and much more. Any email server that is accepting email via SMTP is susceptible to being used by unknown users claiming to be a user at the local domain name to 'spoof' email out through the server.
This can lead to thousands of bogus delivery status notices (DSN), vacation and out-of-office messages, auto-responders, etc., ending up in the inbox.
By adding an additional header to outgoing mail, it provides a simple way for certification providers to vouch for a particular sender without requiring the certification provider to sign (or even know about) any mail that is sent. MDaemon also uses DKIM ADSP (Author Domain Signing Practices), which is an adjunct mechanism to aid in assessing messages that do not contain a DKIM signature for the domain used in the author's address (in the FROM: header). With MDaemon's spam filter blacklist, messages from blacklisted addresses will have their spam scores adjusted upward.
Messages from addresses or domains on the Whitelist (no filtering) will not be processed by the spam filter.
Undetected, this has the potential of putting your company's IP address and domain name on a Realtime Blackhole List (RBL) or DNS Blackist (DNSBL). If the same return-path is used by multiple IP addresses (more than can normally be expected) within a given period of time, then this typically indicates a possible spambot network is being used. Frequent 'Recipient unknown' errors are often a clue that the sender is a spammer since they commonly attempt to send messages to outdated or incorrect addresses. The notifications that are sent to the postmaster have been updated to include the date, time, IP address, and protocol used, to make it easier to find and troubleshoot authentication failures. The account listing can also be filtered based on content in the Mailbox field, Real Name field, or Groups field.
Accounts can be temporarily assigned a weak password when the option to require the user to change his password has been enabled.
Administrators can also generate and email a weak password report to any designated email address.
So far in this article series, we have deployed an Enterprise Pool, configured our Pool, set up DNS, tested connectivity with Communicator 2007 R2, configured our ISA box, and prepared our Edge Servers. Click Install for Install Files for Edge Server to Continue after meeting the Prerequisites (being a local Administrator).
After fully reading the License Agreement, if you agree, Select “I accept the terms in the license agreement .”  Click Next to Continue. Click Next to Continue which will begin the installation process of the Administrative Tools. Click Run to start the OCS Services.  I will not provide screenshots of this process as it is extremely straightforward. Click Next which will begin the OCS-Enable process.  Once this is complete, click Finish to Finish.
For Part 4, I will go through the installation of our Office Communicator 2007 client and get it connected through OCS by configuring DNS. Under Server Port numbers, in the field titled Outgoing mail (SMTP), it may be necessary to change the setting. If you want to use free blacklist services such as these, or if you subscribe to fee-based services, you can define the blacklist addresses for these services. The Internet Agent checks the first blacklist and continues checking lists until the sending SMTP hosta€™s IP address is found or all lists have been checked.
You do this on the Internet Agent objecta€™s Access Control Settings page by editing the desired class of service to add the hosts to the Prevent Messages From exception list on the SMTP Incoming tab. To maintain consistency for your system, you can also copy the list to other Internet Agent installations. You can use the settings on the SMTP Security page to help protect your GroupWise system from malicious or accidental attacks. If you want to prevent future mailbombs from the mailbomb sender, identify the sendera€™s IP address (by looking at the Internet Agenta€™s console) and then modify the appropriate class of service to prevent mail being received from that IP address (Access Control > Settings). With mailbomb protection enabled, if the Internet Agent receives a certain number of messages (the default is 30) from the same host or IP address within a specific time interval (the default is 10 seconds), it discards the messages. Starting in GroupWise 7, you can configure as many strings as needed to identify junk mail and you can use ConsoleOne to specify the strings. One might use a string of asterisks; the more asterisks, the greater the likelihood that the message is spam. As described above, each line of the xspam.cfg file identifies an a€?Xa€? header field that your anti-spam service is writing to the MIME header, along with the values that flag the message as spam. The Internet Agent refuses messages from a host if a DNS reverse lookup shows that a a€?PTRa€? record does not exist for the IP address of the sendera€™s host. For example, content-management software lets you screen email messages for sexist, racist, or obscene language that violates your company policy. It’s not a CNAME record and the value entered for a host in a an MX record must be an A record.
I have only one outbound mail server which is Exchange and I have TMG publishing its services and It's working but I need to create the SPF record.
Optionally, suspicious messages can be refused or have a special header inserted into them. MDaemon's IP Shielding can stop this by specifying that when a user sends an email claiming to come from a specified domain name, that the IP address that user is using must be within a certain defined range.
Backscatter Protection distinguishes between legitimate and unauthorized use of your email address in the MAIL FROM: return path. To learn more about VBR and email certification view Alt-N Technologies' Email Certification. ADSP defines a record that can advertise whether a domain signs its outgoing mail as well as how other hosts can access that record.


MDaemon's Dynamic Screening has been improved by adding a Hijacked Account Detection feature, which will detect, disable, and notify the IT administrator of accounts that send too many messages in a given timeframe. When a spambot is detected, the connection is dropped and the sending address can optionally be blacklisted for a designated period of time.
Other filtering options include the ability to display accounts based on their status, such as whether they are frozen, disabled, over quota, forwarding, or using an autoresponder.
MDaemon will display a pop-up warning, asking if you wish to temporarily store a weak password.
The recipient of that report can then notify those users to change their passwords as needed. That goal is how to deploy a single Enterprise Edition OCS Server which is connected to an x64 SQL Server 2005 SP2 Back-End Server. We will begin the steps needed to validate our configuration to make sure the Front End OCS Server is healthy. I will then begin preparation of our Edge Servers followed by configuring our ISA 2006 Server. The Internet Agent then uses the defined services to ensure that no messages are received from blacklisted hosts.
If the sending SMTP hosta€™s IP address is included on any of the blacklists, the message is rejected. Another might use a numerical value; the higher the number, the greater the likelihood that the message is spam. However, for security reasons, we recommend that you create a dedicated GroupWise user account for remote SMTP host authentication. Such software also can alert you when messages or attachments contain proprietary information that you don't want to leave your company. Perhaps the confusion is that you can have an Mx record for a CNAME, but that record must point to an A record. If you are running multiple domain names on your server, you can create one or more separate IP Shielding entries for each domain.
By protecting the return path, MDaemon can determine whether a certain class of messages (such as DSNs, vacation notices, and auto-responders) is valid or not.
MDaemon allows the email administrator to configure settings for the number of messages and time (in minutes) to establish the parameters that best fit an organization's environment.
We first discussed what the lab setup is going to be using VMware Workstation, and then proceeded to the configuration of our Enterprise Certificate Authority.  In Part 2, we went over the preparation and installation of a Front End OCS 2007 Server Pool which were the first few steps in deploying OCS in an Enterprise Deployment. The following sections provide information to help you define blacklist addresses and, if necessary, override a host address included in a blacklist. If you have the Internet Agenta€™s logging level set to Verbose, the log file includes information about the rejected message and the referring blacklist.
When a match occurs, the message is marked for handling by the GroupWise client Junk Mail Handling feature.
You can set different message and timing thresholds depending on the source IP of the incoming connection. You can also set separate limits for connections from reserved IPs, local domain IPs, and all other IPs. In this article, I look at Exchange 2000 Server's native content-management functionality updates to the Virus Scanning API (VS API) in Exchange 2000 Service Pack 1 (SP1) using the Microsoft Internet Security and Acceleration (ISA) Server to control email Exchange 2000 Methods Exchange 2000 provides some built-in methods for controlling unwanted email—from filtering messages based on content to using reverse DNS lookups to verify senders. You can use built-in filtering to prevent specific senders from sending email messages to your servers. Note that the ability to use filtering on SMTP senders doesn't exist in the Windows 2000 SMTP service, only in the Exchange 2000 SMTP service. You define filtering globally, but each SMTP virtual server has filtering options for each IP address.
To select the Apply Filter option, open Exchange System Manager (ESM) by clicking Start, Programs, Microsoft Exchange, System Manager. If the Administrative Groups container appears in the left pane, expand it by double-clicking the container or clicking the plus sign (+) to the left of the container.
If the Administrative Groups container doesn't exist or you have just expanded it, expand the Servers container in the left pane and expand the container for your server.
Click Advanced, and edit any existing IP addresses or add a new address (if the SMTP virtual server listens on additional IP addresses).
On the Filtering tab, which Figure 2, page 8, shows, you can enter the names of senders you want to filter out and choose how you want Exchange to handle the message and notifications. By default, Exchange sends a nondelivery report (NDR) and moves the message to the \exchsrvr\mailroot\vsi #\drop folder (where vsi# is the name of your virtual server—the default SMTP virtual server is vsi 1).
You can also tell Exchange to send copies of the NDR to a location of your choice, which you can specify on the Messages tab in the Properties of the SMTP Virtual Server. Selecting the Accept messages without notifying sender of filtering check box configures the system to not generate an NDR.
The Filter messages with blank sender check box is useful because messages with a blank sender are suspect.
You can archive these messages until you're sure that you aren't filtering out content that you or your users want. If you archive these messages, be sure to monitor the disk partition that holds the archive in case it fills rapidly, because you must manually remove the old messages. Whether you use reverse DNS lookup depends on how much you need it and how likely it is to cause a queue of mail on your SMTP gateways. However, if the server has fast drives and plenty of processing power, you can test how useful reverse DNS lookup is for you. Click Advanced, and in the Advanced Delivery dialog box, select the Perform reverse DNS lookup on incoming messages check box. Microsoft designed the VS API to ensure that all attachments in the Exchange Server Information Store (IS) are scanned before a client has access to the message. VS API in SP1 removes the need for this restriction (as long as you use VS API­based antivirus scanning) and adds content-management functionality when you tie it to a third-party VS API-based message scanner. Although you might have been considering ISA for use as a software firewall, you might be pleasantly surprised to know that you can also use the smart-application filter for basic content management. If the filter finds the string, the filter signals an ISA Server event and drops the message or adds a text string to the beginning of the message's subject line and passes the message along either to the intended recipient or to the administrator. To install the Message Screener component during the initial ISA Server installation, select the Custom Install, then select Add-In Services to see the options that Figure 4 shows. After you install Message Screener (and restart your computer, if this is the initial installation of ISA Server), you can launch the ISA Management console from the Start menu. Launch the ISA Management console by clicking Start, Programs, Microsoft ISA Server, then clicking ISA Management. When the console is running, the top node of the tree is Internet Security and Acceleration Server. Expand the Servers and Arrays node directly below the top node to find the server you want to configure (the display name is SERVER Array). In the Taskpad view in the right pane, click the Secure Mail Server icon to launch the Mail Server Security Wizard.
If the ISA Server is your only SMTP server, you can't run the Message Screener; you must forward the mail to another SMTP server.
Click the Extensions node, then double-click the Application filters folder in the right pane.
In this configuration area, you can enable filtering on attachments by filename, extension, or size. To add filtering keywords, select the Keywords tab, then click Add and type in a word you want to filter on.
Unlike products from other vendors, the SMTP Filter doesn't have an import function to bring in an established list of offensive phrases from a file or vendor Web site.
You must manually enter the email address to which you want the messages forwarded; the filter doesn't resolve names from the Global Address List (GAL).
If you delete a message because it contains a certain word, the fact that a later keyword match would have forwarded the message to you is irrelevant. To configure the Win2K SMTP service, launch Internet Services Manager (ISM) by clicking Start, Programs, Administrative Tools, Internet Services Manager. Double-click the server container, then right-click the Default SMTP Virtual Server and select Properties.
Click Add to enter the computer, group of computers, or even the domain that is allowed to relay SMTP mail to this server.
On the Delivery tab, click Advanced, and in the Smart host field, type the name of the mail server computer for all outbound messages if you use a single route.
However, I found the example to be a great motivation to start looking at third-party plug-in applications.
Companies such as Aladdin Systems, Baltimore Technologies, GFI, and Trend Micro are developing add-ins to allow SMTP filtering at the ISA Server. Microsoft is positioning ISA Server to be your main defense against all types of entry into your network.



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