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"Don't download any e-mail images that weren't initially displayed by your e-mail program. That also confirms that your e-mail address is available to spam."
That won't have any effect. All modern email clients let the user choose whether or not to download and show images in messages. Just because there are images in an email does not mean they confirm the validity of your email address, or that they are somehow nefarious in nature.
Don't buy into the paranoia espoused by the columnist here.
xorcist, although you are correct about most email clients having the ability to show or not show images, it is possible for a spammer to validate an email address by displaying images in email. I've seen image tags using syntax such as firstname.lastname@example.org and this can be filtered by a server's log files to pull up email addresses viewed in an email program.
Spammers can get very devious.
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