Domain pointing question

Using nameservers to point to a domain

[salmo]

I know that this issue has probably been covered in the past but would be grateful all the same if someone had a quick answer to my question.

I have a main domain (well ranked and PR6), I have recently registered another 2 domains which I may use in the future and am currently only using for e-mail. I have temporarily set up the nameservers of these two domains to point to my primary one. I would hate to incur a penalty for this so am seeking reassurance that this is not going to create a problem.

If it is even remotely possible that Google could misread my motives I would rather simply park these domains for future use.

[korkus2000]

Are they redirects to the main domain? If they are 301s or 302s you will be fine. Just make sure they don't look like mirrors.

[budterm]

>>If it is even remotely possible that Google could misread my motives I would rather simply park these domains for future use.<<

Call me paranoid, but I hate to depend on any search engine properly interpreting 301 or 302. I would just park the domains. (Just my opinion of course!)