FacebookMySpaceTwitterDiggDeliciousStumbleuponGoogle BookmarksRedditNewsvineTechnoratiLinkedinMixxRSS FeedPinterest

Spam Firewall

123inkjets.com - Printer Ink, Toner, & More!

What is a Spam Firewall?

A spam firewall is a hardware device that sits between your internet firewall and LAN. It is called a "firewall" because it provides data filtering of email packets, and blocks the packets that meet the criteria of "spam". Spam firewalls can also provide anti-virus protection, anti-spyware, anti-spoofing and anti-phishing services, depending on the model you choose. A spam firewall is not designed to protect your network against intruders such as hackers - you will need a regular internet firewall for that.

How Does a Spam Firewall Appliance Work?

Spam firewalls use a variety of methods for determining what is considered spam and filtering it out. Normally a form of blacklisting is used, which automatically filters out email from known spammy addresses. A whitelist may also be used, which allows the administrator to identify addresses or domains that should never be blocked. Keyword scanning may also be used, allowing the administrator or individual user to block emails containing certain keywords or keyword combinations. A form of message authenticity checking is also normally used to identify valid "from" addresses, check details of the entire SMTP process, or validate legitimate IP addresses. Many spam firewall appliances also use bayesian algorithm filtering, which help the firewall block more spam over time as it "learns" what is considered spam based on message history, user input and other analysis. Incoming message flow filters also look at the number of incoming messages and where they are from, allowing them to quickly spot and stop a sudden barrage of spam emails that have been mass-distributed from the same source. Spam firewalls are very "smart" and good at eliminating the majority of spam email that comes into a network. They are not 100% effective, but many come close.

Are Spam Firewalls Expensive?

Spam firewall appliances range in price from around $2000 up to $20,000 or more, depending on the number of users it needs to protect and features. Many spam firewalls have optional features like antivirus or anti spyware. Spam firewalls need to be kept up to date with the latest data on known spam sites, new algorithms, updated filters, etc... This is normally handled by the firewall manufacturer as an auto-update feature. As with most network appliances, an annual maintenance plan is usually purchased for the purpose of keeping the firewall up to date and performing it's best.

What About False Positives?

Spam firewall appliances use many sophisticated techniques to identify and block spam, generally with very good success. Because spammers are constantly change their techniques in order to get their junk mail past the latest and greatest spam filtering technologies, spam firewalls must continually monitor patterns and make filtering corrections. Spam firewall manufacturers are also constantly make corrective configuration changes to keep up with the battle against spammers. For this reason, even the best spam firewall is going to filter out "good" mail from time to time. This is called a "false positive", and administrators (and users) must always be on the lookout for this. Most spam firewalls have sensitivity thresholds that can be adjusted by an administrator to help overcome false positives.

A spam firewall appliance is not your typical "set it and forget it" firewall, but the advantage of having such an appliance on your network far outweighs the need for some administrative work. If your organization experiences a lot of spam mail - get a spam firewall and experience the difference!

DJ is a corporate IT Manager and author of the following sites covering information technology topics: Computer Security for Everyone, Save on Phone Service with VoIP, Internet Phone Service - The Future is Here!


0 #11 broderie 2017-09-23 14:45
Thanks for the auspicious writeup. It actually was a leisure account it.

Glance advanced to far delivered agreeable from you! However, how can we be in contact?
Quote | Report to administrator
0 #10 paintball 2017-09-17 20:19
Admiring the hard work you put into your blog and detailed information you provide.

It's great to come across a blog every once in a while that isn't the same out
of date rehashed material. Fantastic read!
I've bookmarked your site and I'm including your RSS feeds to my Google account.
Quote | Report to administrator
bhangra music
0 #9 bhangra music 2017-08-18 06:44
Hi to all, how is everything, I think every one is getting more from this site, and your
views are good in favor of new visitors.
Quote | Report to administrator
downloader for music
0 #8 downloader for music 2017-08-17 10:26
Your way of telling all in this article is really good,
every one be capable of without difficulty understand it, Thanks a lot.
Quote | Report to administrator
free mp3 albums
0 #7 free mp3 albums 2017-08-12 03:38
I do consider all the ideas you have presented in your post.
They're very convincing and can certainly work. Nonetheless, the posts are too quick for novices.
May you please lengthen them a bit from next time? Thank you for the
Quote | Report to administrator
0 #6 mp3fiesta 2017-08-01 10:59
I'll right away grasp your rss feed as I can not find your e-mail subscription link or newsletter service.
Do you've any? Kindly permit me realize in order that I may just subscribe.
Quote | Report to administrator
0 #5 mp3skullhead 2017-07-20 10:22
yo is it safe
Quote | Report to administrator
ed sheeran songs
0 #4 ed sheeran songs 2017-07-16 10:55
Attractive portion of content. I simply stumbled upon your web site and in accession capital to assert that I get in fact enjoyed account your weblog posts.
Any way I will be subscribing to your feeds and even I success you access persistently quickly.
Quote | Report to administrator
0 #3 manicure 2017-05-02 16:09
What's Going down i am new to this, I stumbled upon this I have found It positively useful
and it has helped me out loads. I'm hoping to give a contribution & assist other users like its aided me.
Great job.
Quote | Report to administrator
0 #2 missedcall.xyz 2015-11-21 15:40
Hi! I know this is kinda off topic however , I'd figured
I'd ask. Would you be interested in trading links or maybe guest writing a blog post or vice-versa?
My website covers a lot of the same topics as
yours and I believe we could greatly benefit from each other.
If you might be interested feel free to shoot me an e-mail.
I look forward to hearing from you! Awesome blog by the way!
Quote | Report to administrator

Add comment

Security code

OS X Keyboard Shortcuts

Key Effect
C Start from CD
D Start from 1st Partition
N Start from Net Server
R Resets laptop screen
S Single-user boot
V Verbose Mode
V Unix console msgs
Power Keys Effect
Ctrleject icon Shutdown, sleep, restart
Opteject icon Sleep
CtrlOpteject icon Shutdown
Ctrlpower Restart










FTC 16 CFR Part 255 Disclosure

Since 2006, iTechGuide.com has provided independent reviews. Our reviews, ratings and awards are not based on any incentives or commissions. Notwithstanding, to keep our service online we accept compensation from some of the companies whose products we review within and outside of the IT industry, including, but not limited to, paid advertising placements, referral fees, and in-content advertising links.

English French German Italian Portuguese Russian Spanish

Popular Content