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Why would internal Email from Google Apps filtered as junk email by Outlook 2007?


I have included _spf.google.com in my company's domain SPF record as describe in Google Apps help - http://www.google.com/support/a/bin/answer.py?answer=60764

_spf.google.com      IN      TXT      v=spf1 ip4:216.239.32.0/19 ip4:64.233.160.0/19 ip4:66.249.80.0/20 ip4:72.14.192.0/18 ip4:209.85.128.0/17 ip4:66.102.0.0/20 ip4:74.125.0.0/16 ip4:64.18.0.0/20 ip4:207.126.144.0/20 ip4:173.194.0.0/16 ?all

But from the email header I can see that it is sending out from mail-px0-f172.google.com (209.85.212.172) which is not in the above ip address range. The most closely matched is ip4:209.85.128.0/17. Am I or Google missing something here? Any help is very much appreciated!


mail-px0-f172.google.com (209.85.212.172)
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itontap001
Asked:
itontap001
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3 Solutions
 
OriNetworksCommented:
Im pretty sure ip4:209.85.128.0/17 includes the address 209.85.212.172 becuase of the /17 subnet mask

Just add the address ranges to the whitelist
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itontap001Author Commented:
thank you OriNetworks for pointing that out, could you explain why even with _spf.google.com added to our SPF TXT record, emailing internally for users using Google Apps Gmail to users using another mail service provider will trigger Outlook to mark it as junk and filter to junk email folder?

For most of our users, our email are hosted with another mail service provider - XX. Some of our users uses Google App and their email are forwarded to Gmail to alias domain (e.g user@m.domainname.com) from XX mail server receiving mail for (e.g. user@domainname.com).

So when Google Apps users email some other internal users whose email is hosted with XX, the email gets filtered by Outlook client as junk email. Any ideas would be greatly appreciated.

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OriNetworksCommented:
you can check mxtoolbox.org for anything that may be wrong with your dns or server configuration ir the possibility that your domain nay be on some kind of blacklist. The bigger possibility is that the outlook spam filter on the other end detects a different pattern of email and is incorrectly determining this to be spam. Outlook filter can sometimes do this for perfecly legitimate domains.
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OriNetworksCommented:
Sorry that was mxtoolbox.com
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