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Receiving error message sending emails to some emails addresses

Hello;

We have an Exchange Server 2003 and Microsoft Outlook (client email) on each PC. To send email internally we use the Microsoft Exchange Server but we also have our email provider settings on each Outlook which we use to send emails outside because for some reason we have problems sending external emails using our Exchange Server. For know the cause why we can use our Exchange Server is not important.

The thing is we are having problems sending emails to some emails addresses. For example some of my co-workers cannot send emails to these domains: @costafarms.com, @kubota etc. but I can send emails to these domains using my email address from my PC but not using a different computer. The people receive message error such as:

1. Your message did not reach some or all of the intended recipients.

Subject:      From Richards Tractors & Implements, Inc
Sent:      3/17/2011 9:40 AM

The following recipient(s) could not be reached:

marisave@costafarms.com on 3/17/2011 9:46 AM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
< mail30c40.carrierzone.com #5.0.0 SMTP; 554 Denied (Mode: normal)>

Or

2. Your message did not reach some or all of the intended recipients.

Subject:      test from Richards Tractors & Implements
Sent:      3/17/2011 9:33 AM

The following recipient(s) could not be reached:

ljohanning@kubota.com on 3/17/2011 9:46 AM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
< mail14c40.carrierzone.com #5.0.0 SMTP; 554 Service unavailable; Client host [mail14c40.carrierzone.com] blocked using Barracuda Reputation; http://bbl.barracudacentral.com/q.cgi?ip=12.35.133.194>

Let me tell you that if we use the email server website belong to our email provider (mail.abac.com) everything work. For easy use we prefer send emails from Outlook.

I know the basic from emails. Please give me a hand what could be the problem.
Thanks

Microsoft-Mail-Internet-Headers.pdf

SOLUTION

wgray05

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ASKER CERTIFIED SOLUTION

Glen Knight

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Agnes Sevilla

ASKER

Thanks for response.

I will check if we are blacklisted. But putting the Exchange Server beside, we have two accounts in Outlook, one is microsoft exchange and the other mail.abac.com which is the account that has the settings from our email provider most of the time we use the last one because with exchange we received errors.

Using our emails provider settings we have for Incoming server(POP3) 995
Outgoing server (smtp) 465

Explain me something: when we use the settings from our email provider the server who receive our email only see the information from our email provider? this is not on a blacklist they already checked.

Please explain me this.

thanks

Agnes Sevilla

ASKER

I went to myipaddress: My PC has 12.35.133.195 which is not in a blacklist
the rest of the PCs have 12.35.133.194 this ip is at least in one blacklist.

Do you have any idea why I have a different IP?

thanks

Glen Knight

that's unusual but not unheard of. If te server is on 12.35.133.194 and that is blacklisted then this is the cause of your problem.

Agnes Sevilla

ASKER

yes the server ip is 12.35133.194 but why my PC has a different IP if it is on the same network.

Glen Knight

I'm not sure, you could have your IP address specifically natted to a different address, I honestly don't know without looking deeper in to your network configuration.

Agnes Sevilla

ASKER

Demazter, what kind of infomation do you need from my network to help me with IP addresses problem?

Let me know if you can help me or not.
Thanks

SOLUTION

Agnes Sevilla

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Agnes Sevilla

ASKER

wgray05 help me to find out my external ip and check if we were blacklisted and demazter also help me giving me the steps to configure Exchange server correctly. This is the problem.

Thanks