Still Taking TOO LONG to download my e-mails...

When I open my computer…it loads eM Client…most times now…it takes hours and sometimes days to “Syncing Messages”…I can’t get my emails…nothing…just stuck in “Syncing Limbo”…“WHAT IS THE PROBLEMS GUYS???” Sometimes…no problem (but not often)…loads right up…but now…90% of the time it gets locked up in this Syncing limbo…