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hi..
If i'm using mailrelayoptions:relayforaddresses ,
that mean i should know all my user ip address ?
thanx..
----- Original Message -----
Sent: Sunday, May 07, 2000 1:01 PM
Subject: Re: [IMail Forum] Spam
Problem...
How i want to stop the
spammer from spam my imail server?
Please
help...URGENT..
Faizal,
URGENT: what is he
doing?
Go to
controlpanel:Imail:SMTPSecurity:mailrelayoptions:relayforaddresses and enter
your blocks of ip's. then stop/start the smtp service. This is
immediately stop all mail relaying from ip addresses outside of your "trusted"
ip blocks. It is the best anti-spam setting for Imail.
If the spam is
still getting through 1)somebody on your ip's is a spammer (behead him), or 2)
the spammer outside you ip block and is spoofing your ip addresses.
Imail cannot fix either one of these.
For 1) use a dull axe
for 2) have your router dude block ip spoofing at your border router
by setting up packet filtering that drops (and logs) all packets on the
"outside" (incoming link, from your upstream backbone connection) interface
that announce themselves as coming from your "inside" ip block.
One
"side effect" (there are ALWAYS side effects) of "relay for addresses" is that
your roaming users who try to send mail through your Imail are actually
relaying mail and will be blocked because they connect from outside of your
trusted ip blocks. So in their mail program, they must used SMTP AUTH so
when they send mail to your Imail, the "SMTP client" of their mail program
will AUTHenticate itself with Imail, which you must have set, in SMTP
security: Disable SMTP AUTH reporting
"unchecked".
Len
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