Big problem with exchange 2010

Hi There,
I am migrating from one exchange 2003 to a news server exchange 2010. The both are in production.
Users on the news server (2010) are connected to  exchange server.
Users receive some mails one on 3 and if they send a mail, the receiver don’t receive it.
Please help me
I have nothing in events log
Thanks,
Regards,
simlip
simlipAsked:
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adriaanvwCommented:
Please confirm: do you use a smart host/relay for sending your outgoing e-mail?

First, restart your Transport service. If the issue still exists, then try the next steps.

Second, restart all of your Exchange services. If the issue still exists, then try the next steps.

Third: have you checked your Send connectors in Exchange? Check that it/they are enabled under Organisation Configuration > Hub Transport > Send Connectors. If it is enabled already, then activate logging for the Send connector by switching the Protocol Logging Level from "None" to "Verbose".

Now restart your Transport service, and then check the logs for clues as to what is happening with your outbound mail.

The send logs are stored here by default:
C:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\Logs\ProtocolLog\SmtpSend
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Simon Butler (Sembee)ConsultantCommented:
Event log doesn't tell you anything.
You need to look at Message Tracking using the tools in the Toolbox to see what Exchange did with the message.

You also need to include more information:
1. Is Exchange fully up to date?
2. Are the recipients internal or external? If internal, are they on Exchange 2010 or 2003?

Simon.
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simlipAuthor Commented:
Hi
Exchange is fully update.
recipients (persons who send ou receive mail ?)
My users are internal
Persons who received mail are internal and external
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adriaanvwCommented:
Have you checked whether your public IP address for Exchange has been blacklisted? You can do so here:

http://mxtoolbox.com/blacklists.aspx

Also, in Exchange Management Console, click on Toolbox and open the Queue viewer. What do you see in there?

Also, how do you send your outgoing mail? SMTP direct or via a smart host?

Finally, how do you receive your incoming mail: via a mail scrubbing service or direct on Port 25?
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simlipAuthor Commented:
Hi  There,
Now, I can receive.
Users can not send mails to internal and external mails
Do you have one idea ?
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adriaanvwCommented:
Do outgoing e-mails remain in the user's Outbox, or does is show up in Sent Items?
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simlipAuthor Commented:
mails go to Sent Items
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simlipAuthor Commented:
Others information:
On track mails, mail sent are not listed
On email queue to send, I have no message and no errors
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adriaanvwCommented:
Silly question perhaps, but is your Transport service running?

Also, please do check your IPs for blacklisting:

http://mxtoolbox.com/blacklists.aspx
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simlipAuthor Commented:
Yes transport is well runngig
My ip adress is not blacklist
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simlipAuthor Commented:
"Second, restart all of your Exchange services. If the issue still exists, then try the next steps."
Thanks a million
It is working now.
I am going to create a ask because in fact I have a general problem at startup of exchange 2010.
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simlipAuthor Commented:
:)
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