No provision for submitting votes by any other means other than physically going to election posts(in practice, the government uses schools), entering a tiny makeshift voting booth (which in theory protects you from prying eyes and gives you privacy, but it really doesn't), selecting one paper sheet among the pack you received before entering the booth (one sheer for each political party), placing it in an envelope, sealing it, exiting the booth and dropping it into a box. It doesn't get more analogue than that. Also, there are penalties for those who do not vote - in theory you will be prosecuted, in practice, AFAIK, it rarely happens, but either way, it adds to the ridiculousness of the whole thing (of course the parties want you to vote, and they conspired to force you to vote by making it illegal not to.. This is Greece).