via or by - which one is correct to denote by means of [duplicate]

Possible Duplicate:
“Communication [over, by, through, via, with] email”

Which one is more formal - via or by?

Send via email

or

Send by email

Also, same in case of...

Notify via email

or

Notify by email

or

Notify through email


Both would be found in a formal context and which you use is a matter of personal choice. I prefer the native preposition because the unnecessary use of Latin words in a modern context,, such as one that talks about emails, sounds out of place.