Exchange 2010 relay lookup issue Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2007 / 2010 / 2013 › Exchange 2010 relay lookup issue This topic has 1 reply, 2 voices, and was last updated 5 years, 8 months ago by spidermiet. Viewing 1 post (of 1 total) Author Posts RobL216Member Feb 09, 2015 at 9:10 am #164879 Hi, I am very close now to eventually removing our Exchange 2003 server! :-D There are basically just a few systems relaying of the server which I need to move over to Exchange 2010. Most have gone well but there are a couple of systems that don’t seem to want to play ball. Is there a change in the way Exchange 2010 handles relay lookups? I ask because the system used to have just the email alias when using 2003 but this does not seem to work with 2010. A telnet session to the old 2003 server shows that by putting the alias in it resolves the full address but when using a telnet session to 2010 it states it is an invalid address. Have I missed a setting on 2010? Rob Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.