Where to sign in to WorldPosta business Email?
Sign in at mail.worldposta.com
If you’re signed in with one account and want to sign in to another account, you can do the following:
a) Sign out: you can simply sign from the signed in account, then sign in to the new account.
You can open another user’s mailbox (you need a permission to do this from your account admin).
Simply open your WorldPosta webmail [mail.worldposta.com] click on your name > open another mailbox and type the other mailbox Email address.