Hi, > I totally agree - this is not an effective means of antivirus protection, > its placement would only be a means of reducing exposure. I guess one key question is: how important is email that comes in after hours? If you are certain that any email coming in at night is bogus, and/or that any legit email tht comes in at night is OK to reject (100% sure) then you could go down this route, I suppose. Apart from palying games with scheduling services on the server itself, you could consider getting an external firewall that blocks port 25 to the server "outside hours". best regards Mike