Need advise on MSExchangeMTA rather interesting behavior

I have exchange 2k3 running on server 2k3, recently brough it up as new member of admin group. Today noticed in Application Log that MSExchangeMTA runs constantly sending a message and receiving a message like every other second or so. First I have following:

Event Type:      Information
Event Source:      MSExchangeMTA
Event Category:      Interface
Event ID:      3279
Date:            4/6/2006
Time:            2:53:01 PM
User:            N/A
Computer:      ServerName
Description:
A MT_WAIT message was sent to the /DC=BIZ/DC=CompanyName/CN=CONFIGURATION/CN=SERVICES/CN=MICROSOFT EXCHANGE/CN=CompanyName/CN=CONNECTIONS/CN=SMTP (ServerName-{9EFFC764-B9D7-41BE-8729-7142F075A25C}) gateway on session index 9. [XAPI GATEWAY 30 138] (8)

For more information, click http://www.microsoft.com/contentredirect.asp.

This follows next:
Event Type:      Information
Event Source:      MSExchangeMTA
Event Category:      Interface
Event ID:      3267
Date:            4/6/2006
Time:            2:53:01 PM
User:            N/A
Computer:      ServerName
Description:
A MT_WAIT message was received from the /DC=BIZ/DC=CompanyName/CN=CONFIGURATION/CN=SERVICES/CN=MICROSOFT EXCHANGE/CN=CompanyName/CN=CONNECTIONS/CN=SMTP (ServerName-{9EFFC764-B9D7-41BE-8729-7142F075A25C}) gateway on session index 9. [XAPI GATEWAY 30 60] (8)

For more information, click http://www.microsoft.com/contentredirect.asp.

Microsoft doesn't have information I was looking for. It's not an emergency however want to know what's going on.
TimmyMurAsked:
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SembeeCommented:
Have you got logging turned up? Those messages are harmless, but are usually only seen when diagnostic logging is turned up.

For rather obvious reasons you only turn up the diagnostics logging when you are looking to diagnose a problem, otherwise all you get is noise.

Simon.

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