Tag Archives: corporate email

How to Build a Computer Network

If you own or manage two or more computers you need to connect your computers in a wired network to share Internet Connection and other services.
Here is a complete How To Build a Network.

Whether you are doing it at home or at your workplace, creating a computer network is not very difficult if you are a handy person and you have basic knowledge of computer networks. We will cover here most of the concepts you need to make your own LAN.
Computer Network
The series of articles will show you how to create a physical network and how to configure it to provide various services to your network users. We will focus on TCP/IP networks as this is the most common networking protocol.

Why Do You Need a Network?

You need a network if you need to share services for two or more computers.
Services that can be shared include: File sharing, sharing a network printer, Internet sharing, email services, Intranet, media broadcasting, etc…
In a home network, it is very common to share a printer and the Internet Connection.
In Business environment, the network becomes more complex and many more services will be needed to accommodate the use of many computers in a single network. Such services are DHCP – for automatic IP configuration, DNS – for name to IP resolution, corporate email, Proxy Server – for increased security on Internet, Intranet server – this is a private web server, VOIP phone system, etc…

What are the Limitations of My Network

You Ethernet cables are limited to 100m between any two active devices. If you need more than 100m between any two active devices such as computer and switch or computer to computer, you need to add a repeater or a hub, a switch will work as well, at each additional 100 meters, (or 333 ft.).
Depending on your materials and equipment, your network can run at 10Mb/s, 100Mb/s or 1Gigabit/s.
The most usual is to use Cat 5 or Cat 5e cables and connectors. A Cat 5 network can provide a speed up to 1000Mb/s.
If you need to connect at longer distances the more suitable solution are
Coaxial cable – up to 500M, speed 10Mb. You need special repeaters or hubs or special network cards.
The fiber optic – 10Km or more, speed up to 100Gb, depending on the equipment. It is the most expensive solution; the price though can be affordable for slower connections. For slower connections, most of the cost will consist on running the cable between the two points.
DSL is the cheap way to connect two remote offices if you have an available copper pair between the two offices.

What Do I Need to Make My own Network?

To make your own Ethernet Network you need the following equipment:
UTP/STP networking cable, RJ-45 connectors, Crimping tool, Punch down tool, Keystone Jacks, Wire stripper / Knife, Network Tester, Patch Panel, Network Switching device. The list includes also a stud finder, drywall saw, measuring tape, mounting plate, fish tape, ladder, and the usual tools such as screwdriver, drilling machine, hammer, etc…
Ample descriptions on the tools and materials are provided by following the links.

Computer Network Planning

The typical Ethernet Network has a star topology. That means that you have a central device, (network switch), that connects all of your network participants. This is important for your planning since you will have to run all of your cables to a central point. Make your measurements and place your central point in such manner that all of your cables are 100m or less. This includes the patch-cord as well.
If you have computers farther than 100m you will need to install a repeater. Alternatively you can use other types of connection, (coax, fiber optic, etc…), see the limitation paragraph.
When you run a cable consider the maximum amount of devices that can be stuffed into that office. It is a lot cheaper to run an extra cable or two per each office location than to run a single cable after the initial installation.
Install the keystones as close as possible to the actual location of the computer. Plan this thoroughly and pick the best location so that the patch-cord is out of the way.
Buy extra cable and extra connectors.
Use common paths for your cables whenever possible. If you run ten cables at once saves a lot of work and time.
Plan your cable route. Use ceiling whenever possible, it is the easiest path. Avoid running the cables near big electromagnetic sources.

Buying Computer Network Tools and Supplies

Do not buy cheap tools and materials. If you do, you will be penalized in different ways:
At the installation time you will get all sorts of problems trying to connect poor materials, cheap cable will be damaged more easily when manipulated, connectors will break easier.
In time the quality of the network will decrease if poor supplies and tools are used.
Overall experience and quality will be very poor if you get too cheap. If buying expensive tools is not justified, (a one time job), try to borrow good tools and don’t buy cheap ones.
Follow the links to learn what to look for when you are buying specific materials.
Now that you planned and bought all the Networking tools and supplies you can proceed to the Running the Cables for a Computer Network.

Email Marketing – How to Avoid being placed on Spamming Lists

Filtering unsolicited email messages or SPAM is a very important issue for everybody. Companies, Internet Service Providers and Email Providers are spending more and more resources to become effective to blocking Unsolicited Emails. They will blacklist anyone who will try to send SPAM and they will stop delivering emails from sources known as spammers.
At the same time, Internet Marketing has become an important business component for most of the Companies and Email Marketing is essential for many businesses. How can a company deliver its messages to clients and not get on spam-lists? This post will try to give you some guidance on how to avoid being placed on spam lists.

Rules to avoid being placed on Spamming Lists

User related rules

  • Check the subject line of your email. Do not leave the subject line blank, have a long string of "Re:" or "Fwd:”, or use many exclamation or question marks or use all capital letters.
  • Avoid blacklisted and spammy words in your subject line and message body. Common words blacklisted at different spam filters include pornographic terms, pharmaceutical terms, "free", "money", "mortgage", and "cash."
  • Avoid adding many attachments, using only images or including a long list of URLs in the body of your email message.
  • Reduce the number of identical emails you are sending at one time. Try sending your emails in smaller batches if you have many different people who need to receive the same email.
  • Ask your email recipients to add you to their email program address book or white-list.
  • If you suspect your computer has been infected by a virus or Trojan or any other form of Malware, contact the IT Department immediately.
  • Do not use the Company’s email for personal use. Personal use includes but is not limited to:
    • Electronic Communication for personal use
    • Chain email letters – the distribution of chain letters is strictly interdicted using the corporate email. Chain emails are emails that ask or encourage you to forward the message to other people. Chain letters can include information about new viruses most of the times – hoaxes, promises of good luck, religious messages, request for help, etc…
    • Subscribing to newsletters or email lists is not allowed using the corporate email address. By subscribing to such services, you expose your account and Your Company email server to SPAM.
  • DO NOT send Unsolicited Email.

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How to avoiding the Spam Lists for the Email Administrator

  • Use and maintain SPF policies. This will help other servers to determine any rogue sender that will try to spoof email addresses in your domain. Remember, maintaining the SPF record is mandatory. If you forget to update the SPF record when an infrastructure change, (such as a new SMTP server), is made other SMTP server will treat the new server as a possible SPAMMER and will flag legitimate email as SPAM.
  • If your Marketing Department is using a new email Marketing Company, don’t forget to update the SPF records, (if they are using your regular addresses).
  • Ideally, the Email Marketing Campaigns should be conducted under a different domain name, or a sub-domain. Example: yourcompany.com is your main domain and you are using admin@yourcompany.com as email addresses and marketing. Yourcompany.com is your Email Marketing Domain Name and your address will be admin@marketing.yourcompany.com.
  • If your users use pop clients to connect to the server make sure you configure a submit port on your server (587), or install a certificate on your server and instruct users to use SSL for sending emails. This will avoid keeping the port 25 open for email clients. This should be open to servers only.
  • Block port 25 for outbound traffic on your company’s firewall. This way even if your computers get infected with a Trojan they will not be able to send messages.
  • The use of a good Anti-Malware is mandatory.
  • Write and distribute policies in the company, this document could be a good start.

How to Avoid the Spam-Lists for the Marketing Department

  • Do not send unsolicited emails – sending an email to someone who unsubscribed or never subscribed is the most serious SPAM offense.
  • Do not use Outlook or any other email client to manage mass emailing. Marketers, sometimes, have the impression that the usage of such email clients for their campaigns, give them more control over the Mass Emailing. But in fact there is no way to manage opt-outs, you will use your own infrastructure for sending mass-emailing which is not good, and you can easily send duplicate messages to your recipients or not send at all.
  • Do not use mass-emailing solutions for your email blasts. Your public IP address will be flagged as SPAMMER.
  • For Mass Emailing, use Companies that are specialized in Email Marketing. They are setup so they minimize the risk to be flagged as SPAMMERS, the applications are feature rich, with tracking options, and give the recipients the opportunity to opt-out if they choose to.
  • If you, still want to use in house mass emailing make sure you insert an unsubscribe address in your email.
  • To make sure your email does not get in the Junk Mailbox, avoid using too many links in your email, and use as little space as possible for images.
  • Do not send too many emails at once, even if the email is perfectly conceived, sending too many emails in a short period could trigger the SPAM filters, and your email will be blocked.