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Old 11-30-2005, 06:08 AM   #1
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Outlook w/ exchange2003 account not sending

Out of an entire network of PCs running Outlook2002 with email accounts on exchange2003, I have one PC that refuses to work. Outlook recognises and accepts the exchange user account, but no mail can be received, and when sending, it comes straight back with an "undeliverable" message. Anyone got any ideas as to why this could be happening?
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Old 11-30-2005, 01:14 PM   #2
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What happens when you send an email to this person? Do you get an undeliverable message? If so what is the reason for undeliverable? Have they ever gotten email at this account?
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Old 12-15-2005, 10:53 AM   #3
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I'm having a similar problem with one outlook client sending through Exchange. If he uses POP the emails go out.

Two messages are the following:

1) Reporting-MTA: dns;domain.com
Final-Recipient: rfc822;user@user.com
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;553 Attack detected from pool x.x.x.x.
(if he sends via pop it goes out fine whether he uses mail.domain.com or mail.isp.com

2) Reporting-MTA: dns;domain.com

Final-Recipient: rfc822;user@user-inc.com
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;550 5.7.1 Mail from site 72.144.191.132 refused

(if he sends via pop it goes out fine)

Should i set up a smart host to point to the ISP? Never had to set one up before.

The problems happen via outlook web access as well.

Thanks in advance.
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