Emails not coming through

Hello - I just noticed that our emails have not been coming through for a few months.  Any idea as to why this is happening?

Hello ThirdPiece,

Sorry for the trouble caused to you, I checked your mail address and it was on our bounce list. Now it's removed. This should fix your problem, please check and let us know if issue still persists.

If you need any further assistance please feel free to contact us anytime.

Thanks.