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In message <[EMAIL PROTECTED]>, Marc Perkel <[EMAIL PROTECTED]>
writes

>Just wondering how to do this. I'd like to test to see if the sending 
>host at port 25 open. Would this be a good way to detect spammers?

no, it would be dumb

> Would 
>a host sending email to my host not have port 25 open to receive email?

too many negatives there for me to parse, so I'll make a firm statement

"the world is full of machines that are legitimate senders of email
which do not accept incoming email on port 25"

- -- 
richard                                                   Richard Clayton

Those who would give up essential Liberty, to purchase a little temporary 
Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755

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