HiI am new to exchange and using ISA to publish it.Is there anyway out so that the Exchange IP would not get blacklisted.Any help would be appreciated.ThanksHarpreet

Hi, Yes prevend that you are an open relay to the internet. Allow only trusted IP-addresses on the send connectors and check that anonymous logons are prohibited. Regards, Johan blog: www.johanveldhuis.nl

Technet Article "Securing Exchange Communications" is a good read. Here is the link: http://www.microsoft.com/technet/security/prodtech/exchangeserver/secmod44.mspx#EQEAG "securing SMTP Communications" is the section you want to read for preventing open relay.

HiThanks all for your helpHarpreet