Yeah, have them add your mail server as the 20 MX priority in their dns record.

ex.

mail.their.domain       A       xxx.xxx.xxx.xxx
                        MX      10 mail.their.domain.com.
                        MX      20 mail.your.domain.com.

then use this format in your hosts file. (%sysroot%\system32\drivers\etc\hosts)
open with notepad/wordpad



xxx.xxx.xxx.xxx domain.com xxx.xxx.xxx.xxx mail.domain.com

xxx's obviously representing their ip address. When their 10 priority is unreachable, and mail headed their way will shoot to yours. When their mail server is back on-line, they can telnet to your server on port 25 and issue the etrn command to send any mail waiting for them immediately.

ex.
YOU TYPE:
telnet your.imail.server.your.domain.com 25 <return>
etrn mail.their.domain.com
IT RESPONDS:
250 queuing mode for mail.theirdomain.com started
YOU TYPE:
etrn their.domain.com
IT RESPONDS:
250 queuing mode for mail.theirdomain.com started
YOU TYPE:
quit

it is not necessary to have to do that as the retry times will keep kicking their messages towards them until their time is up.

also be warned that spammers sometimes start with the lowest priority MX to send through. spam is yummy!

did this help? it is late, go to bed. ;)

wes

Lim Siew Yin wrote:
Hi ppl,

I offer web & email hosting to a client. (small scale)
Recently their IT consultant helped them install a LOCAL email solution for
them.  Due to finger pointing whenever the client
has email problems, I have advised them to use only ONE email solution to
simplify the matter.  I have suggested for them to
use their own local email server instead of mine.

However, since they are using broadband, they want to use my email server as
a backup/secondary email server, so in case
their line is down, the emails will be redirected to me.  And when their
server is up again, it will collect the emails from my side.

Is this possible with iMAIL?  and if it is .. how do I go about doing it?

Thank you for your time.


SY Lim.



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