How do I get rid of mayonnaise smell?
The strongest smells in mayonnaise should be vinegar and egg. There shouldn't be any yeast, and therefore any yeast smell, so that is a bit concerning. I am not sure what might imitate a yeast smell.

I don't know how to counter the smell since I am not sure what the origination of the smell is. Does it taste okay? Is the texture okay? I do find that homemade and store brand mayonnaises have pretty different smells in general.