We recently change our ISP and we use exchange to send and receive external mails. After making the appropriate changes to my public ip and effecting changes in my switch,router and firewall settings, I could not send or receive external mails but there is no problem with the internal mails. please help me out

Hi Do you got a singel server solution? Have you changed the MX record so it points to your new ip address?Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Go to mxtoolbox.com and see if mx record is resolving to correct IP address. If that is fine, check if the FW is forwarding the emails to correct server. if that is fine check the send and recieve connector (http://msexchangeteam.com/archive/2006/11/17/431555.aspx)Raj

Hi samdeshi, Above gave some good information. If you change the public ip, it may be spend some time to replica between the Public DNS server, so it would be failture for a period. Reagrds! gavin