There are currently three ways that multiple domains can be managed from a single login:
Instead of linking a single login to multiple accounts, you may want to consider simply locking down the settings and shared quarantine of one sub-account. See this article for details.
By linking multiple accounts to a single login you can toggle between accounts from within the control panel. When a login is linked to multiple accounts you will see all domains from all accounts listed in the domain selector at the top of the control panel on the right. Domains will be grouped by account. This can be helpful for IT consultants that want to assist clients that are set up directly with SpamHero.com (as opposed to sub-accounts in their reseller account).
How to link a login to multiple accounts:
Adding the same contact to two separate accounts will automatically link that contact's login to both accounts. The login is based on the contact's email address, therefore creating a contact with the same email address on two separate accounts will automatically give that contact access to both accounts.
Here's how to add a contact to your account:
It is possible to manage multiple domains from a single account. When multiple domains are linked to the same account you will see a "down arrow" next to the domain name in the upper right corner of the control panel. Clicking on the "down arrow" will display a list of domains that you can toggle between and manage.
How to add multiple domains to a single account:
There is also a button in the SpamHero control panel that goes to the alternate order form for adding additional domains to your account.
Our new reseller program allows you to have a master reseller account with sub-accounts for each of your customers. You have access to all accounts, but your customer only has access to their own sub-account. This access is provided to your customers through a private label control panel with your branding on it. For more information, take a look at the Private Label Reseller Program.