That's the problem with MX records.

They have different priorities, from 10 to 50, 10 being the highest.  Make sure server A is 10, and B is 50.

However you'll still find some emails find their way directly to B, despite the highest priority being A.

Nothing really you can do about that besides removing server B from the MX records completely.


James

--
http://www.TodHost.co.uk - WebHosting Solutions



Pamcho wrote:
	I have the following configuration:

MAIL SERVER A: With DSPAM and QMAIL-SCANNER
MAIL SERVER B: With all the mailboxes

	All my domains have

MX 10 SERVER-A
MX 20 SERVER-B


	So the mails go to SERVER-A, the are filtered, and then, using
smtproutes, sent to SERVER-B.


	If SERVER-A crashes all the mail go to SERVER-B without filtering,
but no mail is lost.

	If SERVER-B crashes, SERVER-A keeps the mails until SERVER-A goes
up.


	It works great with just one problem: SERVER-B receives mails that
no go through SERVER-A. Especially a lot of SPAM.

	Is there any way to fix that problem?








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