ganlin_liu wrote:
Hello,
I want to add some domains which can bypass spamassassin, for example, if I add
deom.com, it could straightly avoid the filter.
where can I find this option to set up?
This can be more complicated than you might think.
You'll want to put a whitelist_from or whitelist_from_rcvd entry in your
local.cf file.
On a Centos 5 install, this is located in /etc/mail/spamassassin.
More information about whitelist_from and whitelist_from_rcvd can be
found at
http://spamassassin.apache.org/full/3.2.x/doc/Mail_SpamAssassin_Conf.html.
The complication is here:
If you add a line like this:
whitelist_from *@deom.com
all email with a from address of <something>@deom.com will get a -100
added to its spamassassin score, effectively preventing the message from
getting blocked by simscan. But the 'from' address is easily spoofable,
so this can lead to more spam getting through.
The preferred option is whitelist_from_rcvd, like this:
whitelist_from_rcvd *@deom.com deom.com
This means that any message with a from address of <something>@deom.com,
coming from <server>.deom.com, gets the -100 treatment. This should
prevent messages getting by where the 'from' address has been spoofed by
a spammer.
The trick is determining what server(s) messages from deom.com should be
coming from. You can do this by looking at headers from previous ham
messages received from deom.com senders. The last 'Received: from'
header before the message got to your toaster will probably include the
information you're looking for.
Brent Gardner
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