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Spam Blocker Information |
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Blackhole or Fail - Which One Is Better For Your Mail Server?
Very often SPAMMERS take advantage of catch-all email setup on webservers. Every email no matter what the recipients email address is will be caught by the default email account. It is highly recommended not to use catch-all email accounts and to discard SPAM send to non-existing email addresses. SPAM will clog up your SMTP server and consum resources like bandwidth and disk space in mailboxes. In most mail servers and web control panels (like cPanel) the user or admin can decide what will happen to emails with no existing recipient on the server. Refuse to the let emails onto the server and to let the sender's mail server deal with it (option: ":fail:") or to accept these incoming messages but then to delete them right away (option: ":blackhole:". Our conclusion: :fail: is the preferred option over :blackhole:. The :blackhole: option accepts everything sent to the domain mail server and then throws away the email going to a non-existing email account. This option uses the full amount of bandwidth, and also requires that the server be reading and writing messages to disk before they are deleted... multiply this by 1,000 messages a day or so and you can imagine the impact onto your server resources. Imagine your an email address from your domain (a non-existing one) has been spoofed to send out SPAM messages that even carry a virus. Most natural many of these messages will bounce back and hit your mail server. Your web server would have to deal with thousands of attachments at a time. Performance will go down - no matter what. :fail: stops emails send to invalid recipients from entering the mail server in the first place..Exim will reject each message during the smtp handshake conversation - therefore the actual email message will never make it to your server. It is being refected from entering your system and the sender's email server has to deal with the stuck message. This option is also the better one for legitimate emails where the sender has actually mis-spelled the recipients email address. He would get a bounce message informing him so that the error can be corrected. Depending on your hardware - a server can handle many more :fails: than it can do :blackholes:. This article can be published by anyone as long as a live back link to http://www.webhostingresourcekit.com is provided. (this note can be removed as long as a link from the author's resource box is provided) Christoph Puetz is a successful small business owner (Net Services USA LLC) and international author. Guides, Tutorials, and Articles for small businesses - http://www.webhostingresourcekit.com
MORE RESOURCES: table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/0-0fd=Rurl=http://www.prlog.org/10147767-affordable-network-security-software.htmlcid=1275345927ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNHgUNMz8i0B8R-93caEQ1lJUXR0fgAffordable Network Security Software/abrfont size=-1font color=#6f6f6fPRLog.Org (press release),nbsp;Romanianbsp;-/font nobrNov 27, 2008/nobr/fontbrfont size=-1bSpam Blocker/b. Uses all sorts of spam technologies like blacklists, bayesian filters, signatures, and optical character resolutions to scan email and detect b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd width=80 align=center valign=topfont style=font-size:85%;font-family:arial,sans-serifa href=http://news.google.com/news/url?sa=Tct=us/1i-0fd=Rurl=http://www.examiner.com/x-778-Houston-Texans-Examiner~y2008m11d23-Texans-Browns-recapcid=1273466367ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNHO85m99N_U-KAwZkO-gD1LV7hKMAimg src=http://news.google.com/news?imgefp=joD4_RhKzIwJimgurl=image.examiner.com/images/blog/author/img806burge_bio.jpg width=80 height=67 alt= border=1brfont size=-2Examiner.com/font/a/font/tdtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/1-0fd=Rurl=http://www.examiner.com/x-778-Houston-Texans-Examiner~y2008m11d23-Texans-Browns-recapcid=1273466367ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNHO85m99N_U-KAwZkO-gD1LV7hKMATexans out-ugly Browns for first road win in a year/abrfont size=-1font color=#6f6f6fExaminer.comnbsp;-/font nobrNov 24, 2008/nobr/fontbrfont size=-1It seems like the schedule always works out that way. Keep your heads up - and don#39;t forget to put that GM of yours on your bspam blocker/b list./font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/2-0fd=Rurl=http://www.thevillagesdailysun.com/articles/2008/11/21/villages/villages02.txtcid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNFbM_lIv8j6m1hEd8WjShwtQ3Ia2AInvestigators warn public to avoid falling for scams/abrfont size=-1font color=#6f6f6fVillages Daily Sun,nbsp;FLnbsp;-/font nobrNov 21, 2008/nobr/fontbrfont size=-1In cases such as the UPS e-mail, options are limited, but Gates recommended purchasing a bspam blocker/b and never clicking on links in unsolicited e-mails. b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/3-0fd=Rurl=http://en.epochtimes.com/n2/content/view/7373/cid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNF7Me5geVHfDZBn9iYi-Zx6yfRmHAAvoiding Identity Theft/abrfont size=-1font color=#6f6f6fThe Epoch Times,nbsp;NYnbsp;-/font nobrNov 19, 2008/nobr/fontbrfont size=-1A bspam blocker/b set to high will keep your mailbox free of most annoying junk mail, as well as potentially dangerous attachments. b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/4-0fd=Rurl=http://www.miamiherald.com/entertainment/people/story/768589.htmlcid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNGS-rT6RXhKIu6TBPlr9Zu2BMmqcgSingin#39; the Fontainebleau shut-out blues?/abrfont size=-1font color=#6f6f6fMiamiHerald.com,nbsp;FLnbsp;-/font nobrNov 14, 2008/nobr/fontbrfont size=-1There#39;s even one named after the band: the bSpam Blocker/b martini, a combo of Absolut Pear, amaretto, melon liqueur and cranberry juice for $11. b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/5-0fd=Rurl=http://www.mxlogic.com/securitynews/spam/spam-drops-after-mccolo-shut-down487.cfmcid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNHn-7EN79lLcYGsOjhKrkuzXAfkrwSpam drops after McColo shut down/abrfont size=-1font color=#6f6f6fMX Logic,nbsp;COnbsp;-/font nobrNov 13, 2008/nobr/fontbrfont size=-1However, there may still be a need for bspam blocker/b software in light of the fact that levels of spurious email have increased in the days after the b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/6-0fd=Rurl=http://blogs.techrepublic.com.com/security/%3Fp%3D656cid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNFlwB5hqg-z_rJQSsAoBgV45I-AhAMore email security tips/abrfont size=-1font color=#6f6f6fTechRepublic,nbsp;KYnbsp;-/font nobrNov 11, 2008/nobr/fontbrfont size=-1The more spammers and phishers spoof your email address that way, the more likely your email address is to end up on bspam blocker/b blacklists used by ISPs b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/7-0fd=Rurl=http://searchsecurity.techtarget.com.au/articles/27806-REVIEW-Watchguard-s-Firebox-X-Edge-cid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNG_kNu9fTRpfVe7t5BYpjIjWw6jOgREVIEW: Watchguard#39;s Firebox X Edge/abrfont size=-1font color=#6f6f6fSearch Security,nbsp;Australianbsp;-/font nobrNov 20, 2008/nobr/fontbrfont size=-1Another two optional features activated by the exchange of funds with WatchGuard are “bspamBlocker/b”, which uses the Recurrent-Pattern Detection (RPD) b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd width=80 align=center valign=topfont style=font-size:85%;font-family:arial,sans-serifa href=http://news.google.com/news/url?sa=Tct=us/8i-0fd=Rurl=http://www.enterpriser.in/India/Know_It/Watchguard_s_First_XTM_Network_Security_Appliance/551-95425-448.htmlcid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNHDoMev41iKLLa23K-gU4_vt_iGPQimg src=http://news.google.com/news?imgefp=UdRCxNH03WYJimgurl=images.enterpriser.in/entrimages/storyimages/95425_matter.jpg width=80 height=51 alt= border=1brfont size=-2enterpriser.in/font/a/font/tdtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/8-0fd=Rurl=http://www.enterpriser.in/India/Know_It/Watchguard_s_First_XTM_Network_Security_Appliance/551-95425-448.htmlcid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNHDoMev41iKLLa23K-gU4_vt_iGPQWatchguard s First XTM Network Security Appliance/abrfont size=-1font color=#6f6f6fenterpriser.in,nbsp;Indianbsp;-/font nobrNov 19, 2008/nobr/fontbrfont size=-1XTM 1050 has optional security service subscriptions, including WatchGuard bSpamBlocker/b with virus outbreak detection, WatchGuard Web for URL and content b.../b/font/div/font/td/tr/table table border=0 width= valign=top cellpadding=2 cellspacing=7trtd valign=top class=jfont style=font-size:85%;font-family:arial,sans-serifbrdiv style=padding-top:0.8em;img alt= height=1 width=1/divdiv class=lha href=http://news.google.com/news/url?sa=Tct=us/9-0fd=Rurl=http://insn.org/%3Fp%3D4442cid=0ei=WwU4SZC4FJ_S9QSAn6WgDwusg=AFQjCNG1o3B7EcN_jtr5IxCSVzUD8ZwZ6AFinance Minister/abrfont size=-1font color=#6f6f6fInternational Nepal Solidarity Network,nbsp;Nepalnbsp;-/font nobrNov 20, 2008/nobr/fontbrfont size=-1We use a bspam blocker/b that filters comments with certain words. If you cannot post a comment, please send it to the webmaster. Also, comments with more than b.../b/font/div/font/td/tr/table Spam-Blocker - Google News |
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