Does your company use mail service provider to manage your company mails?

I wonder does your company use mail service provider to manage your company email? If so, which mail service provider will your company choose?

Sometime i have my email rejected or blocked or have no response after a long time. Dose that mean that mail has been dragged into the spam or may it mean it is still on its way to the destination?Does your company use mail service provider to manage your company mails?
I can not accurately answer your question, but I will guess that the majority of times the mail goes into their spam/bulk mail. Most businesses set it up in order to discourage "personal" mails.