Sorry couldn`t help myself with the thread title

So I am a brand new player to STO (played the trial AGES ago) and have just got the digital deluxe version from Steam.I was chatting away in Zone and got a PM.As I do on CO I hit backspace and replied only to be told that I CANT PM non friends with a trial account.??

Is this a problem with my account or is the 30 days game time included not considered a `proper` subscription ?.
Its a bit aggravating tbh as I have to yell my replies to all and sundry who honestly probably dont want to hear my half of a conversation.

Apart from that so far so good.I`m thinking this may be as much of a time warp as Champions Online