if you just wish to post, go to spell casters, but i strongly urge you to polish the spells and not upload any fake spells. not only does the site have plenty, but spell casters is trying to fix this issue. [a few of them anyway]
your second option could be to join a coven that would let you post them if left to a vote or something. in my coven when members have a spell they wish to add, they're sent to myself, Grg.Legend or one of the council members. it's then read, determined of it's a working spell [meaning it's not a 'turn into' type spell] retyped if needed [spelling/grammar] and submitted with full credit going to the person who made the spell. [it'll still say it was submitted by myself or Legend or whoever, but we typically post the original persons name about 3 times] i think those are your only two options; spell casters or a coven that will let you mail the council your spells.