On 07/10/2011 04:41 PM, Constantin IOAJA wrote:
On 11.07.2011 01:47, Carlos Herrera Polo wrote:
Ok, but.... If the spammer send and email to my first server (mx 10)
and spamdyke reject the session SMTP (graylist or rdns) , or
spamassasin reject the email, then... The spammer smtp server will
send the email to my second SMTP server ?... How work smtp backup
server when spam is block ?
Spamassassin NOT rejects the messages !
SpamAssassin comes after confirmation is sent to the corresponding
server that received the message!
Corresponding server has no reason to send the message to the second MX.
SpamAssassin marks messages with SPAM and depending on how you setup :
to delete or leave them.
http://wiki.apache.org/spamassassin/FrequentlyAskedQuestions
Spamdyke send certain codes (SMTP Error Codes) ; These codes are
recognized by all mail servers.
http://www.spamdyke.org/documentation/README.html#SMTP_ERROR
Typically, a mail server does not send messages to the second MX if the
first MX is active.
Maybe just send manual (with scripts) directly to the IP of the second
MX server to do so.
That is another reason for installing safety measures on the second MX
server.
I do not understand the last question.
Regards,
Constantin
P.S. Please post at the end of message for coherent discussion.
I might add that while most legitimate mailers will send to the primary
MX first, many spammers send to lower priority mailers on purpose, as
they often don't have anti-spam measures installed. By all means, you
should run spamdyke, clamav and spamassassin on your secondary server.
It's not a big deal if a message happens to get graylisted on each
server. It will still eventually get through.
--
-Eric 'shubes'
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