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Exchange 2007 not forwarding to external domain - Ok from outlook but not unix/sendmail

Posted on 2011-03-14
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Last Modified: 2012-08-14
Hi We have an issue where email is all routing ok from outlook but when sent from UNix box the emails DO send to internal domain - but when going on to external domain from us outside LAN they are not sending? - They were working all ok when the sendmail Unix side was pointing to our exchange 2003 server - but when the unix guys changed to preferred server (exchange 2007) no. - both exch 2003 and 7 boxes are internel and forward on to a smart host(email) in DMZ
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Question by:philb19
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Expert Comment

by:MegaNuk3
ID: 35135617
Setup a relaying Receive Connector on the E2k7 server that allows the unix servers IP address to relay:
http://exchangepedia.com/2007/01/exchange-server-2007-how-to-allow-relaying.html
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by:philb19
ID: 35135671
MegaNuk3: Thanks  - Am i reading this correct - I need to give the exchange 2007 server a secoundary IP address? - If this is the sace how does the UNIX sendmail server know to send to the new IP? o r am i missing something - Thanks
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Shreedhar Ette earned 2000 total points
ID: 35135682
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Expert Comment

by:MegaNuk3
ID: 35135708
Yes, give your E2k7 server an additional internal IP

Your Unix team will have to point their server to send to the new E2k7 IP address

If Unix can authenticate during the SMTP connection then you don't need to do any of the above because authenticated users can relay by default. Can Unix be set to authenticate?
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Author Closing Comment

by:philb19
ID: 35144147
Also thanks to meganuk3 - (sure that works as well)

excellent help guys(legends) thanks heaps
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