After I wrote all that, I realized you're getting it from a remailer.
I do the above with oils from IP or any Mex oils. The remailer should have filtered it before they packaged it but there's no rule or regulatory body to oversee this.
I don't know your remailer so I can't say what he does. I just know that it MUST be done (by someone) from the containers IP send his oils in.