Homestead E Mail is very unreliable

Hello Homestead,

I run a very large karaoke competition and it is critical that my emails get to the contestants. I hear it all the time, I didn't get an email. Of course we all know most of the time it's on the receiver end....with blocks etc.....but this time around I decided to actually listen to my people and approximately 2 out of 10 do not get the email at all when it is sent out BCC. Can HS look into this and see if there is something can be done.