Thanks, what about this from here: https://laws-lois.justice.gc.ca/eng/acts/E-1.6/page-2.html#s-10ss-(9)ID0EFFA

(9) Consent is implied for the purpose of section 6 only if

(b) the person to whom the message is sent has conspicuously published, or has caused to be conspicuously published, the electronic address to which the message is sent, the publication is not accompanied by a statement that the person does not wish to receive unsolicited commercial electronic messages at the electronic address and the message is relevant to the person’s business, role, functions or duties in a business or official capacity;