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troubleshooting Question

Lost e-mail

Avatar of jeffreychorba
jeffreychorbaFlag for United States of America asked on
Exchange
15 Comments1 Solution738 ViewsLast Modified:
I have a SBS 2003 R2 server that is running Exchange and is attached the Internet via a dedicated IP cable modem in the New York area.  The ISP is Road Runner.  I am having a strange problem where e-mails sent from this server to a certain other ISP (ptd.net) will never make it to their destination e-mail boxes at ptd.  They do not bounce nor do we receive any warning messages.  I have tested sending to many other domains and it works fine.  The server also receives e-mail fine, even from ptd.net.   I confirmed with ptd that we were not in the black list at ptd.
Anyone have any ideas??