サーバーがダウンしてて、メールチェックできない。

server

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

down (opposite of up); becoming lower; being brought down; bringing down; being down (e.g. with a cold) and unable to continue (work); down (e.g. a system); not running (e.g. servers); download; downstream; down (feathers)

email; mail (usu. in phrases and compound words); male

check; plaid; checkered; checking; monitoring; looking over; scrutinizing; inspecting; check (banking); cheque

to be able (in a position) to do; to be up to the task; to be ready; to be completed; to be made; to be built; to be good at; to be permitted (to do); to become intimate; to take up (with somebody); to grow; to be raised; to become pregnant