I know that MorphOS is not a secure operating system, except that it is less likely to get attacked simply because of its obscurity (not worth the hackers time and effort for such low number of users), but is there any additional security features built into Iris and/or Wayfarer?

Is it unlikely that a virus, or other malware intended for Windows/Linux/MacOSX users will have any effect on MorphOS systems? (probably a noob question, but I'm feeling particularly stupid today)

For reference, I had considered setting up one MacOSX system, for the express purpose of doing all of my email correspondence on it, in hopes that it would protect my Windows system from becoming infected if I limited it just for other tasks, and never opened another email on it in the future. Is this unrealistic?