@JaXanim
Nobody's safe!
I'm afraid so. Running Linux or AmigaOS just means your machine doesn't get infected, but you'll still get bombarded with the mails.
If you are firewalling them off, make sure they get deleted from your ISP rather than just ignored, otherwise your mailbox may get clogged with them and start rejecting genuine mail.
(I pity those poor buggers who got hit on mail accounts that have quotas on them...)
As for being subject to virus arracks, this will always happen on popular systems, just like piracy. The Amiga had its fair share of both in its heyday, and now they mostly attack Windows users. As Linux becomes more popular, so the virus threats and piracy grow.