Sharma, Ashish:
> Hi,
> 
> I have a Postfix mail receiving server, on this I am using sid-milter
> (found at http://sourceforge.net/projects/sid-milter/ got from
> http://www.postfix.org/addon.html) tool to validate senderID and
> SPF.
> 
> Here the problem is for mail servers that implement Sender-ID,
> mail servers that are implementing sender-ID and having their
> mails sent via Blackberry are having their sender-ID (sender-id=neutral)
> not getting verified on my postfix end.

According to the Microsoft website:

    How Sender ID Works

    Sender ID seeks to verify that every e-mail message originates
    from the Internet domain from which it claims to have been
    sent. This is accomplished by checking the address of the server
    that sent the mail against a registered list of servers that
    the domain owner has authorized to send e-mail.

In other words, it "works" only when the domain owner adds blackberry's
IP addresses to their SenderID authorization record.

http://www.microsoft.com/mscorp/safety/technologies/senderid/overview.mspx

        Wietse

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