Double Irony! (was Re: [linux-elitists] ruben's stupid filter)

Bulent Murtezaoglu bm@acm.org
Mon Mar 25 13:25:40 PST 2002


>>>>> "MM" == Marc MERLIN <marc@merlins.org> writes:
[ ... agreement elided ...]
    MM> In theory however you can annoy another site by issuing mails
    MM> with an envelope pointing to them and causing callbacks to
    MM> them. [...]

Yes, but it doesn't seem to be more than an annoyance.  It seems just as 
costly to the annoyer as it is to the annoyed -- there's no
amplification going on.  Whether you really want to be a middleman is
up to you of course.  

I do think, though, that given the presence of catchall accounts,
back-up MX's that don't verify the recipients and the popular trick 
of forging the envelope sender to hotmail/yahoo/aol etc. your non-VRFY
VRFY trick will prevent much.  Do you have stats on this?

thanks,

BM



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