Returns a list of company-specific email rules
[
{
"id": 1,
"company_id": 3,
"name": "Test Rule",
"pattern":"Github",
"description":"Some Decsription",
"expense_account_id": 1,
"asset_account_id": 2,
"vat_id": 3,
"cost_center_id": 4,
"user_id": 4,
"vat_code_id": 5
}
]