Exactly my point - it was that comment by the US copyright office which circulated here in the country. I am not a lawyer, nor an expert with copyright law but as a comment - of course the US copyright office would want to discourage sending songs by email because that would defeat the purpose of their existence. Imagine if everyone does this paractice then goodbye na ang office nila for lack of funds.
Comment number 2 - the poor man's copyright is exactly that - a recommended way to get protection in case a songwriter is not in a position to have his work registered. If one is in a position to have his work registered legally, then by all means do so.
Comment number 3 - the classification F I mentioned earlier is something being recommended by many people in the know wherein you register the soundtrack recording of your songs. The advantage of this is that you get to pay per disc as opposed to paying per song. This makes copyright registration much much cheaper - but strictly speaking - it is not the real song copyright registration. Classification F registers a soundtrack recording of the song belonging to the soundtrack producer (e.g. record companies register their albums in this classification). Nakiki ride on lang tayo kasi part of the soundtrack registration would mean listing the song and their necessary credits lke artist, songwriter, etc. Doon tayo nasali sa date of registry. So kung tutuusin, hindi siya naiba sa poor man's copyright which is to place a date of registry to anything of value to prove its existence.
Again as a recommendation, have your songs duly registered sa copyright office. Another means of doing so would be to have a group of them jointly registered as soundtrack recording copyright so that you don't pay as much. But if you really cannot afford to do so, then do the poor man's copyright.