https://bahua.com/a/iM0v All responses and updates to "Gmail and Bob's" Fri, 11 Nov 2005 20:18:00 -0600 en-us https://bahua.com/a/iM0v
In a nutshell, it allows you to add a string to your google ID that you can then use to filter the messages. For example, chicus at gmail dot com (not my addy) can be appended with chicus+spam at gmail dot com. You can then set up a filter that sends all messages to chicus+spam at gmail dot com to your trash, or archive it with a spam label.

I think a less useful but more interesting effect can be that you track who is selling your info. For example, if I register ONLY at boston.com with chicus+bdc at gmail dot com (bdc = boston.com) I should be able to deduce that any message coming to that address was either from boston.com themselves or from someone to which they gave my information. I've wondered how some of the junk mailers get my information and this is a way to track it down, at least in part.

Anyhow, thought I would share. Some of his comments are a bit cheesy and many of the tips are pretty lame but it is worth a glance. I am referring to #5.

http://g04.com/misc/GmailTipsComplete.html

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