Smtp outgoing (port 25) blocked after upgrade

Since upgrading to mavericks, all outgoig access on port 25 never connects.
I havd upgraded 2 machines - One is working  and the other is not work.    Both machines were working before the upgrade.
This is NOT just related to the mail client - It affects port 25 outgoing at the telnet level.
Does anyone have an answer to this yet?
Tim

Hi Layman,
According to your description, my understanding is that you want to configure the SMTP to use port 465 for outgoing email in SharePoint.
Per my knowledge, Exchange server will secure communication over any port, but will not use SSL, so there is only TLS encryption in SMTP.
To use port 465, we can add the port 465 under Network tab to the Receiver Connector for SharePoint Outgoing email. And then TCP port number on Outbound Connections in
DSMTP Virtual Server properties.
More references:
http://blogs.technet.com/b/tirumals/archive/2012/03/17/step-by-step-configuration-of-outgoing-emails-from-sharepoint-to-microsoft-online.aspx
http://support.microsoft.com/kb/829721/en-us
http://social.technet.microsoft.com/Forums/exchange/en-US/8dc08cf8-8662-4a02-a181-f821e8d59d06/exchange-smtp-using-port-465?forum=exchangesvrgenerallegacy
For more information, you can post your question to the forum for Exchange: http://social.technet.microsoft.com/Forums/exchange/en-US/home?category=exchangeserverlegacy .
More experts will assist you, then you will get more information relation to Exchange.
Best regards.
Thanks
Victoria Xia
TechNet Community Support

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