Exchange 2013 - Send/Receive email through ISP

I have built an Exchange 2013 CU8 on a dedicated VM.  All servers are running Windows 2012 R2 and Exchange server is a member server in my local domain.  I am able to send/receive email between users internally to my domain; however, I cannot send email to an external email recipient such as  I have determined that my ISP (suddenlink) does block port 25.  It looks like their SMTP server ( @ must be used with authentication.

I don't how to configure Suddenlink's smtp server either into my Exchange server or if necessary on the Outlook client.  Also, is there anything I need to configure on my router?

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Simon Butler (Sembee)ConsultantCommented:
You just need to configure the Send Connector with their server address and the username and password as required. Nothing else needs to be done on the router.

Inbound email would be a different matter - you need to verify if they block inbound port 25 or not. If they do then you will need to find out if they will unblock, or you will need to use another service for inbound email.


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BigmacMcAuthor Commented:
Thanks for the feedback.  I know they do block port 25, but don't know if its inbound/outbound or both.
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