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Sending legitimate email through the SPAM filter maze
Ever worry that your important outbound emails might not be reaching their intended recipients? It seems like everyone has had at least one important email not get through to the intended party, only...
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Avoid SPAM filters by ensuring your DNS is setup correctly
This tip is for all the email server admins out there. Many mail servers have SPAM filtering options enabled that subject the sending mail server to a battery of DNS tests before accepting any mail....
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PTR DNS records and SPAM Filtering
Blocking spam is an arms race between spam detection and detection avoidance techniques. Lately spammers had the upper hand but the tide has turned with new PTR record blocking techniques. This is how...
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Fighting Image SPAM: FuzzyOCR Resources
I posted recently regarding the battle against image SPAM. One of the comments pointed out that defeating image SPAM was actually fairly straightforward if OCR software was used to scanned image...
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Don’t want SPAM? Don’t post your email address on the web!
Here’s a tip for everybody who puts together web pages. It may seem obvious, but one big way to avoid receiving SPAM is to keep your email address off of the web. Automated spambots scour the web 24...
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Navigate the anti-SPAM filter maze with SPF
Setting up your DNS with a Sender Policy Framework (SPF) record is a great way to help ensure that your email makes it through to your intended recipients. In a nutshell, a SPF record in your DNS tells...
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Navigate the Anti-SPAM Filter Maze With Common Sense!
Getting your legitimate email through the maze of SPAM filters is a tricky business. Many of the “gotchas” are the result of an improperly configured technical details on your end of things (eg. your...
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Memo to ISPs: The SPAM Problem is Partly Your Fault
ISPs are one of the most vocal opponents of SPAM because it eats up their bandwidth. Yet, a lot of ISPs continue to allow their customers to send email out to the world on TCP port 25 with no...
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Using Postfix to Bounce Invalid Recipent Email Before it Reaches Microsoft...
Postfix is great for filtering SPam Many email administrators prefer to filter inbound email using Postfix running on Linux, FreeBSD, OpenBSD or some other UNIX platform before relaying it to an...
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Anti-SPAM SMTP Proxy (ASSP) One Month Later
I’ve been running ASSP at a client site for Just over a month and I’m really impressed. It was easy to configure and has been quite effective at blocking SPAM. The nicest feature of ASSP is the way...
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