How to win friends

Fri Nov 12 21:11:30 UTC 2010

> A lot don't take + in email address usernames.  + is perfectly legal
> according to the RFC.
>
> + has an interesting effect, at least with sendmail.  For delivering,
> sendmail ignores but preserves everything after the +.  You can use
> this create variants of your email address and use them to track down
> who passed your email address around.  So, for example, you could tell
> Future that your email address is peter+future-hcDgGtZH8xPowKkBSvOlow at public.gmane.org  Mail to
> that address would be delivered to peter-hcDgGtZH8xPowKkBSvOlow at public.gmane.org  But you would
> know that any mail to peter+future-hcDgGtZH8xNBDgjK7y7TUQ at public.gmane.org came because Future
> gave out your address.
> --

Very interesting. I might use that...

P.

-- 
Peter Hiscocks
Syscomp Electronic Design Limited, Toronto
http://www.syscompdesign.com
USB Oscilloscope and Waveform Generator
647-839-0325

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