Hi, Got a problem here, have added my ip with a /32 mask to the whitelist for the mail configuration of Plesk 7.5. This should allow me to relay from this IP (therefore without auth) with no probs. I know if i open up the machine as a relay it works ok. But with the mta set to auth required and the whitelist enabled with my ip - since I do not use authentication - qmail throws out the 553 error since it thinks it needs to deliver the mail locally - hence this isnt working correctly. 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) The relay from the server itself (by logging into the machine and telnetting as localhost) works fine. Anyone got a solution or is having the same problems? Thanks.