>>>>> "Kapil" == Kapil Sethi <[EMAIL PROTECTED]> writes:

    Kapil> Hi, I am facing a serious mail problem, I hope I can find
    Kapil> some Sendmail expert on this list. Can Mr. Raju help.

    Kapil> The situation is:

    Kapil> A person from somewhere in US configures his mailclient
    Kapil> with name as [EMAIL PROTECTED] and with the same
    Kapil> return address. This mail address
    Kapil> i.e. [EMAIL PROTECTED] does not exist. He then
    Kapil> sends hundreds of mails mail to nonexistent Yahoo
    Kapil> mailboxes. Almost all of these mails bounce and are
    Kapil> forwarded to Bharatconnect mailserver. which again rejects
    Kapil> the mails as [EMAIL PROTECTED] does not
    Kapil> exist. But as the double bounce messages are forwarded to
    Kapil> Postmaster my precious bandwidth has been wasted.

    Kapil> Is there any way to stop this type of attack. Today I have
    Kapil> received over 3000 bounced mails from yahoo for 10
    Kapil> different nonexistent bharatconnect mail addresses.

Sorry, you're out of luck.  There's no way to prevent any random
e-mail sender setting his return address to any random user@any random
domain.

Regards,

-- Raju
-- 
Raju Mathur          [EMAIL PROTECTED]           http://kandalaya.org/
                     It is the mind that moves

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