Timezone change cause Exchange 2007 Stop receiving messages

Dear All,

I have a fully functioning exchange 2007 server, but i need to change the timezone from -3GMT to -2GMT, but when I change the timezone, the SMTP server stops receiving messages.

After i change the timezone, the time AND the timezone that the server sends after a telnet on port 25 stay FREEZED like the following:

220 server.mycompany.com.br Microsoft ESMTP MAIL Service ready at Sun, 14 Nov 2010 16:25:19 -0300

Note that the time and the timezone stopped being updated after my timezone change.

I tried to manually set a SMTP session and the result was:

telnet myserver 25
Trying myserver ...
Connected to myserver
Escape character is '^]'.
220 myserver.xyz.com Microsoft ESMTP MAIL Service ready at Sun, 14 Nov 2010 16:25:19 -0300
EHLO mail.testserver.com.br
421 4.4.1 Connection timed out
Connection closed by foreign host.

Running Exchange Server 2007  - Version: 08.01.0311.002
LVL 4
rickybsbAsked:
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getzjdConnect With a Mentor Commented:
Have you tried changing the timezone, then restarting all the exchange services?  or just rebooting?
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rickybsbAuthor Commented:
I tried restarting ALL the exchange services tree, but not rebooting because this server takes a lot of minutes to reboot.
Any tips?
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getzjdCommented:
As we all know quirky issues can sometimes be fixed with a reboot in a matter of minutes, rather than beating your head on the wall for hours.  Unfortunately, I dont have any other suggestions, other than change the timezone and reboot.  :-)
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rickybsbAuthor Commented:
Dude,

Windows is really tricky sometimes.

SMTP service really only come back alive after a reboot.

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getzjdCommented:
Confirmed my suspicions!  Darn Microsoft.  We had a few issues where SAP clients were time stamping transactions wrong after the time change.  Even though the computer time showed correct, the SAP GUI wouldnt pick up the new time until a reboot.
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