- Permission-Based Marketing
- An approach where promotional emails are sent only to recipients who have explicitly opted in to receive them β the foundation of every legally compliant email program.
- Double Opt-In
- A subscription process in which a new subscriber confirms their address by clicking a link in a confirmation email before being added to the active list.
- CAN-SPAM Act
- The US federal law governing commercial email, requiring a physical postal address, a working unsubscribe mechanism, and accurate header information in every message.
- CASL (Canada's Anti-Spam Legislation)
- Canadian federal law requiring express or implied consent before sending commercial electronic messages, with a 2-year implied-consent window from the last business transaction.
- GDPR (General Data Protection Regulation)
- EU regulation requiring freely given, specific, informed, and unambiguous consent before processing personal data for marketing β including email addresses.
- Open Rate
- The percentage of delivered emails that recipients opened, calculated as unique opens divided by delivered messages β a primary indicator of subject-line and sender-name effectiveness.
- Click-Through Rate (CTR)
- The percentage of delivered emails in which at least one link was clicked, measuring how effectively the email body drives action.
- List Segmentation
- Dividing a subscriber list into smaller groups based on shared attributes β purchase history, geography, engagement level β to send more relevant messages to each group.
- Suppression List
- A maintained record of email addresses that have unsubscribed, bounced, or complained β used to ensure those addresses are never mailed again.
- Deliverability
- The ability of an email to reach the recipient's inbox rather than a spam folder, determined by sender reputation, authentication records (SPF, DKIM, DMARC), and list hygiene.
- Soft Bounce vs. Hard Bounce
- A soft bounce is a temporary delivery failure (full mailbox, server timeout); a hard bounce is a permanent failure (invalid address) that should be removed from the list immediately.
- Conversion Rate
- The percentage of email recipients who completed a desired action β purchase, sign-up, download β divided by the total number of emails delivered.