When I built a NAT gateway for home some five years ago (On OpenBSD
3.4), it could go on for more than 580 days without rebooting (though
it didn't act as a public mail server), after which point I had a
power outage and decided anyway to apply updates more diligently
given the hassle it is to upgrade / reinstall a box all the way to
the latest version when you let more than one version pass. :)
--
Stephane LAPIE
Email: lapie@aozora-is.co.jp
Phone: +81 (0)42 319 5164