By default LSMTP does the reverse lookup and ONLY adds the IP if there is a discrepancy. I turned this off for some Owner using SPAMCop via: smtp resolve_calls=false ...and have lost what I consider a useful feature. Given the chance I'd strongly resist doing this. -Kary On 30 Jun 99, at 9:07, Edge, Ronald D quothed Sam Spade: >You appear to be running LSMTP for Windows NT v1.1a >on your email server, and that may be part of your problem, >as Sam Spade suggests that your NT based equivalent of >sendmail is not recording the originating IP of the email.