E-mail works so quickly and well that its complexity is hidden from end users. That's a good thing. But IT managers should know the very basics of how an e-mail message gets from sender to recipient, and what can delay or prevent its arrival. Read this introduction to the technology basics and e-mail protocols.
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E-Mail Technology Definition and Solutions
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Anonymous Wed, 2008-01-09 20:18
If by content filters and fuzzy logic you mean bayesian filtering, this can be very effective. Of course used in combination with other methods.
When trained properly a bayesian filter will filter out the majority of spam. ASSP is a good example (but it also supports a host of other filtering methods). Most other filter types rely on blocklists, are easy to avoid or break the smtp protocol in subtle ways.
If for example spammer's software bothers to retry it will render greylisting useless. Additionally greylisting can cause unnecessary delays which for some (many?) can be a big problem. SPF breaks traditional email forwarding.
cfrankb Thu, 2008-01-10 01:49
The article's last point about "Permission filters" requiring authentication needs to emphasize that the challenge email sent to the alleged/purported sender is often sent to a spoofed/forged victim. It's referred to as Challenge-Response Authentication Protocol (CRAP) for a reason.
Pritesh Chandra Tue, 2008-01-15 16:13
well, i may be wrong but lets see. It states that POP3 downloads the email to the one MUA. And that IMAP can be used to download emails to many MUA since the emails are kept in the mail server.
But now the MUA has options that lets u "Leave a copy of the email in the server" when using POP3. this way, isnt POP3 and IMAP the same now?
Anonymous Thu, 2008-03-06 17:34
mua has an option you can choose in outlook which states download message but leave message on server.
Anonymous Thu, 2008-03-06 17:35
Pritesh Chandra good question I feel the same way
Anonymous Mon, 2008-11-17 20:54
pop3 and imap are two totally different protocols with a somewhat similar purpose, and calling them (almost) the same is a bad idea. :-)
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