We have relay connectors in the HUB servers (Exch 2007) to receive the mails from the remote servers. That have IP adddresses range from 10.1.0.0-10.255.255.25510.5.0.0-10.255.255.255, etc.Now my question, In the above range of IPs, is there any way to find which IPs that relay off of exchange. If I get this info' then I can able decide, which IP should have relay permission and which should not.ThanksFunnyghost

Protocol logs can give you those details when you enable it on the receive connector which is relaying off for the specific IP range... How to Configure Protocol Logging http://technet.microsoft.com/en-us/library/bb124531.aspxAmit Tank MVP: Exchange Server | MCTS: Microsoft Exchange Server 2010, ConfigurationMCITP: EMA | MCSA: M | Blog: http://ExchangeShare.WordPress.com

Is there any tool to grab those IPs from that log (notepad)? Is there any easiest way to get the consolidated IPs from that log?ThanksFunnyghost

Hi,Please check whether the Logparser can help you on this issue:http://msexchangeteam.com/archive/2007/11/12/447515.aspxThanksAllen