On Wed, Jan 28, 2015 at 1:53 PM, Elijah Wright <[email protected]>
wrote:

> [email protected] -- which AFAIR is some other guy
> and also not me.  I guess maybe their filter code DOES understand what
> +string does -- it just does bad things with dots.
>

Google does allow you to append +anything to your email address, and strips
off the +anything to figure the account name.  I use this on a number of
sites to determine how I am getting spam from someone.  If I sign up for an
account with [email protected], and I receive email soliciting
pain pills to my "[email protected]" email, then I'm pretty
sure untrustedvendor sold my email address.  The problem with using this is
that it really confuses some websites, as "+" is a special database
character that is either not allowed or is allowed, but makes the account
unusable.

So, if you look at the "show original" feature of gmail, you'll see:

Delivered-To: [email protected]

Yahoo had a similar feature where you could have [email protected] as your
email address, but "[email protected]", "[email protected]" would
be redirected to your account, but you'd have to explicitly enable or
disable "[email protected]" and "[email protected]"

--
Regards,

Larry Weiner
[email protected]
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