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

Mon Mar 25 13:12:16 PST 2002

On Mon, Mar 25, 2002 at 01:10:16AM -0500, Bulent Murtezaoglu wrote:
>     MM> 550-Envelope sender verification failed 550 rejected: Cannot
>     MM> route to envelope sender <> (The envelope
>     MM> sender does not exist according to your mail server when it
>     MM> was asked): response from
>     MM> [] after "MAIL FROM: <>" was "501 bogus mail
>     MM> from".  [...]
> What happens when you cannot reach the MX for the domain?  Do you
> fall back on something like RFC-ignorant?  As this efectively does a

If I can't reach the MX, I give out a 4xx error.

> VRFY on servers that don't have to be the sending server, did anyone
> complain about this yet?  

It doesn't do a VRFY (which can be disabled), but an RCPT TO, which I agree,
is somewhat similar.
I think 3 people have complained so far that we added a few entries to their

In theory however you can annoy another site by issuing mails with an
envelope pointing to them and causing callbacks to them.

Microsoft is to operating systems & security ....
                                      .... what McDonalds is to gourmet cooking
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