email problems whilst away

i appolagise to any one who has tried to reach me whilst i hve been away.
i have had internet connection problems, even bought another computer whilst way, have set up about 3 different email programs, because i thought people were receiving my emails, as i could receive emails, then i found out that most of the emails i was sending, are now in cyberspace, as they never bounced back to me, and i assume people had received my reply, ROb & i are due back to melbourne on 4th May 2009.
Raelene