How do I correct spoofing problem on two mailboxes of 15

Dear
All

We have a IBM Server with Windows 2003 with Service 2 and Exchange Server 2003 with full update of Microsoft.

Our user have MS Outlook 2003 and Windows Xp, full update.- MS Exchange server have a SMTP connector for delivery the email without autenticartion of outgoing mail options

Well, we have spoofing problem on two of 15 mailboxes.- Every days these two users receive 5 or 8 spoofed mail.

My question is:
1.- Why only these two user have infected?
2.- Why I need to do for correct this situation?

Thank you
mavilaAsked:
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MesthaCommented:
Spoofing is very common. Not a great deal can be done - some will suggest SPF records and the like, but I find they make zero difference.
As for why only those users, they are probably the only users on your network who are in that particular spammer's list. It could also be that their addresses are on the internet elsewhere that have been picked up by the spammer.

-M
mavilaAuthor Commented:
Thank you for respond, but tell me what I need to do for correct this problem.- Let me tell you that I execute locally in each user and antivirus with spam options and I stop in their MS outlook th spoofing mail but we have install in other server a Blackberry server.- Well the income mail the exchange server receive and after this server delivery to BS server.

In each blackbery mobile income the spoofing mail, was bad Idea put only in individual stop spoofing application.

I beleive that I need execute, or configure the MS exchange or put between Blackberry server and MS outlook user an application that this can filer for block this email.

or maybe you can tell me what I need to do, because remember that only in two user happen tis..

I be wait your comment
MesthaCommented:
There is little that you can do. It is a fact of life with email. If it could be stopped then it would go a long way to defeating spam.
If your antispam filter is not able to detect and remove the messages then it is time to find another antispam filter. It is very common, it is one of the oldest spammers tricks so any decent antispam filter should be able to block it. Do ensure that you haven't white listed your own domain though, which is why it is done.

-M

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