Paubox_Email_SDK module.
config.cfg (API_KEY), the same file used by the send functions.
Domains
List domains
Create a domain
Get a domain
Delete a domain
Mailboxes
List mailboxes
Create a mailbox
quota_bytes to the hashref to set a storage quota.
Get a mailbox
Delete a mailbox
Emails
List received emails
after and before cursors are also accepted for pagination.