Definition
B2B email consent refers to the legal basis under which a business may send marketing, sales, or promotional emails to contacts at other businesses. Unlike B2C email marketing, where consent requirements are relatively uniform across jurisdictions, B2B consent varies significantly by region. Under GDPR, B2B marketers may rely on legitimate interest as a legal basis for processing business contacts' personal data, provided that the processing is necessary for legitimate business purposes and does not override the individual's rights and interests. However, legitimate interest is not a blanket exemption — it requires a documented legitimate interest assessment that balances the organisation's purpose against the data subject's privacy expectations. For sole traders and partnerships, GDPR treats the contact as a consumer, meaning explicit consent is required.
Under CASL, B2B consent operates differently. CASL recognises implied consent based on an existing business relationship, which covers situations where the recipient has made an inquiry, entered into a contract, or otherwise had an ongoing commercial relationship with the sender. Implied consent under CASL expires two years after the last transaction or interaction, at which point express consent must be obtained to continue sending. CASL applies to all commercial electronic messages sent to or from Canada, regardless of whether the recipient is a business or individual, making it one of the strictest B2B consent regimes globally.
CAN-SPAM in the United States takes the most permissive approach to B2B email, with no explicit consent requirement. The law focuses on commercial message content — it prohibits false or misleading header information, deceptive subject lines, and requires a functioning opt-out mechanism — but does not require prior consent to send. This means B2B prospecting emails are legal under CAN-SPAM as long as they comply with content and opt-out requirements. However, CAN-SPAM's permissiveness does not override other applicable laws: a B2B email sent to a contact in the EU or Canada must comply with GDPR or CASL respectively, regardless of where the sender is based. Company-level versus individual-level consent is another important distinction, and B2B consent record-keeping should capture the legal basis, the date of consent or legitimate interest assessment, and the specific purpose for which consent was given or claimed.
Best Practices
Document your legal basis for B2B email marketing contacts by jurisdiction. Maintain a register that records whether each contact has given explicit consent (with timestamp and evidence), has implied consent under an existing business relationship, or is contacted under legitimate interest with a completed assessment.
Segment your B2B database by jurisdiction and apply the strictest applicable consent standard to each contact. If you are unsure of the contact's location, apply the standard of the most restrictive jurisdiction they may be subject to, typically GDPR or CASL.
Treat sole traders and partnerships as consumers under GDPR, requiring explicit consent for B2B email marketing. This is a common compliance gap — many B2B marketers apply legitimate interest to all business contacts without checking whether the contact is a registered company or an individual trader.
Implement a B2B consent capture mechanism that records the specific legal basis at the point of data collection. For legitimate interest contacts, document the legitimate interest assessment at that point rather than retrospectively.
Establish an implied consent expiry tracking system for CASL-governed contacts. The two-year clock starts from the last transaction or interaction, so each new interaction resets the timeline. Automated tracking prevents inadvertent sending after consent expiry.
Provide a clear and functioning unsubscribe mechanism in every B2B marketing email, even where consent is not legally required. This is best practice in all jurisdictions and protects sender reputation regardless of the legal obligation.
Related Glossary Terms
Australia Spam Act
Australia's Spam Act 2003 regulates commercial electronic messages including email. It requires consent, functional unsubscribe mechanisms within 5 working days, and sender identification. Penalties reach AUD $2.22 million per day.
Email CASL
Canada's Anti-Spam Legislation requirements for commercial electronic messages, including consent types, record-keeping, and penalties up to $10 million per violation.
Email CCPA
California Consumer Privacy Act requirements for email marketing, including consumer rights to access, delete, and opt out of data collection and sale.
Email Consent Record
Email consent record-keeping captures proof of opt-in including timestamp, IP address, method, and exact wording shown. GDPR requires controllers to demonstrate consent upon request.
Email Consent Renewal
Consent renewal campaigns restore permission to email subscribers whose consent has expired under GDPR regulations, typically achieving 10-30% renewal rates.
Email Crisis Management
Incident response procedures for email marketing, including the send halt kill switch, reputation recovery, compliance breach obligations, and disaster recovery planning.
Frequently Asked Questions
Legitimate interest is a legal basis for processing personal data without explicit consent when the processing is necessary for a legitimate business purpose and does not override the individual's rights. For B2B email, this typically applies when the contact is a business decision-maker and the message is relevant to their professional role. A documented legitimate interest assessment is required.
Yes. CASL applies to all commercial electronic messages sent to or from Canada, including B2B messages. The law recognises implied consent based on existing business relationships, but this consent expires two years after the last transaction or interaction. Express consent is required after expiry.
Yes, CAN-SPAM does not require prior consent for commercial emails. However, cold emails must comply with CAN-SPAM's content requirements: accurate header information, non-deceptive subject lines, a clear unsubscribe mechanism, and the sender's physical address. International recipients may have additional protections under their local laws.
Segment contacts by jurisdiction and apply the most restrictive applicable standard. For EU/EEA contacts, document legitimate interest or obtain explicit consent. For Canadian contacts, track implied consent expiry. For US contacts, ensure CAN-SPAM compliance. When jurisdiction is unknown, apply GDPR standards as the safest approach.
Record the legal basis, the date of consent or legitimate interest assessment, the specific purpose of processing, and any evidence such as consent form submissions or legitimate interest assessment documents. Records should be retained for the duration of processing plus a reasonable period after the relationship ends. ## Related Terms - email-employment-change - email-purchased-list - can-spam - double-opt-in