If you have multiple companies, and therefore multiple virtual mailboxes, you can toggle between them in your account. Mail will be assigned to each corresponding mailbox based on the company and/or PMB number.
Switching Between Mailboxes
When logging in...
Access your virtual mailbox account.
Select 'Which mailbox are you managing today?'
To switch to another...
From your inbox, click on the company name in the top left.
Select from the drop-down menu the mailbox you would like to manage.
The page will refresh to open your mailbox.