Email Marketing Glossary
Plain-English definitions for every email marketing term you need to know. From deliverability to drip campaigns — we've got you covered.
Email Deliverability
The percentage of emails that reach the recipient's inbox rather than the spam folder or being bounced.
Bounce Rate
The percentage of emails that couldn't be delivered to the recipient's mailbox.
Open Rate
The percentage of delivered emails that were opened by recipients.
Click-Through Rate (CTR)
The percentage of email recipients who clicked on one or more links in an email.
DKIM (DomainKeys Identified Mail)
An email authentication protocol that lets receiving servers verify that an email was sent by the domain it claims to be from.
DMARC (Domain-based Message Authentication)
An email authentication policy that tells receiving servers what to do with emails that fail DKIM or SPF checks.
SPF (Sender Policy Framework)
A DNS record that specifies which mail servers are authorized to send email on behalf of your domain.
A/B Testing (Split Testing)
Sending different versions of an email to portions of your audience to determine which performs better.
Drip Campaign
A series of automated emails sent on a schedule or triggered by specific actions.
Email Segmentation
Dividing your email list into smaller groups based on shared characteristics or behaviors.
Email Warm-up (IP Warming)
Gradually increasing email sending volume on a new IP address to build sender reputation.
Double Opt-in
A subscription process where the user confirms their email address by clicking a link in a verification email.
Transactional Email
Automated emails triggered by user actions, such as order confirmations, password resets, and receipts.
Cold Email
Unsolicited emails sent to people who haven't opted in to your mailing list, typically for sales outreach.
Email Automation
Using software to automatically send emails based on triggers, schedules, or conditions without manual intervention.
Sender Reputation
A score assigned by mailbox providers based on your sending patterns, determining whether your emails reach the inbox.
IP Warming
The process of gradually increasing email volume on a new or cold IP address to establish a positive sending reputation.
List Hygiene
The practice of regularly cleaning your email list by removing invalid, inactive, and unengaged subscribers.
Email Personalization
Customizing email content for individual recipients using their data, behavior, and preferences.
Unsubscribe Rate
The percentage of recipients who opt out of your mailing list after receiving an email.
Email Marketing
The use of email to promote products, services, or content to a list of subscribers.
Autoresponder
An automated email sent immediately after a specific trigger, such as a form signup or purchase.
Landing Page
A standalone web page designed to convert visitors into leads or customers, often linked from an email or ad.
Lead Magnet
A free incentive offered in exchange for a visitor's email address, such as an ebook, checklist, or free trial.
Click Rate (CTOR)
The percentage of email openers who clicked at least one link — also called Click-to-Open Rate.
Email Sequence
A series of pre-written emails sent automatically in a defined order, usually over days or weeks.
Welcome Email
The first email sent to a new subscriber, setting expectations and introducing your brand.
Re-engagement Email
An email sent to inactive subscribers to win back their attention before removing them from your list.
List Building
The ongoing process of growing your email subscriber base through opt-in forms, lead magnets, and other tactics.
Opt-in Form
A form that captures visitor information (name, email) and adds them to your mailing list with explicit consent.
Email Copywriting
The craft of writing persuasive email content that drives opens, engagement, and conversions.
Email Subject Line
The first line of text visible in the inbox before an email is opened — the primary driver of open rate.
Preview Text (Preheader)
The short text displayed after the subject line in the inbox, giving recipients additional context before opening.
Preheader
Hidden text at the top of an email that appears as preview text in the inbox — distinct from visible body content.
HTML Email
An email with formatted design, images, and custom layout built using HTML and CSS.
Plain Text Email
An email containing only text with no HTML formatting, images, or styling.
GDPR Email Compliance
EU regulations governing how businesses collect consent and send marketing emails to European residents.
CAN-SPAM Act
US law setting rules for commercial email, including required unsubscribe mechanisms and truthful subject lines.
Spam Trap
Email addresses used by ISPs and blacklist operators to identify senders who don't follow permission-based practices.
Hard Bounce
A permanent email delivery failure due to an invalid, non-existent, or blocked email address.
Soft Bounce
A temporary email delivery failure due to a full mailbox, server issue, or message too large.
Inbox Placement Rate
The percentage of emails that land in the primary inbox rather than spam, promotions, or other folders.
Feedback Loop (FBL)
A system where mailbox providers forward spam complaints back to the sending email service.
Complaint Rate
The percentage of recipients who mark your email as spam — a critical deliverability metric.
Email Newsletter
A regularly scheduled email sent to subscribers featuring curated content, updates, or insights.
Bulk Email
The sending of a single email message to a large number of recipients simultaneously.
Broadcast Email
A one-time email sent to all or a segment of your subscribers, as opposed to automated sequences.
Triggered Email
An automated email sent when a specific event or condition occurs, such as a purchase or page visit.
Behavioral Email
Email campaigns targeted based on the specific actions a subscriber has taken, such as pages visited or content downloaded.
Email Marketing ROI
The return on investment from email marketing activities, calculated as revenue generated divided by campaign cost.
Email Campaign
A coordinated set of emails sent to achieve a specific marketing goal, such as a product launch or seasonal promotion.
Email Template
A pre-designed email layout that can be reused across multiple campaigns, maintaining brand consistency.
Mobile Email Optimization
Designing emails to display and perform correctly on smartphones and tablets, which account for 60%+ of email opens.
Dark Mode Email
Email rendering in dark mode, which inverts or alters color schemes when users have dark mode enabled on their device.
Email Frequency
How often you send emails to your subscriber list — a key factor in engagement and unsubscribe rates.
Email Conversion Rate
The percentage of email recipients who completed a desired action after clicking a link in your email.
Revenue Attribution
Tracking which email campaigns or automations directly generated revenue or conversions.
Email Analytics
The measurement and analysis of email performance data including opens, clicks, conversions, and revenue.
Subscriber Lifetime Value (SLV)
The total revenue a subscriber generates from emails over their entire subscription period.
List Growth Rate
The rate at which your email subscriber list is growing, accounting for both new subscribers and unsubscribes.
Send Time Optimization (STO)
Using data to determine the best time to send emails to each subscriber for maximum open and click rates.
Engagement Score
A composite metric reflecting how actively a subscriber interacts with your emails over time.
Email List Decay
The natural degradation of list quality over time as subscribers change jobs, email addresses, or interests.
MX Record
A DNS record that specifies the mail servers responsible for accepting email on behalf of a domain.
Email Blacklist
A database of IP addresses or domains known to send spam, used by mailbox providers to block unwanted emails.
Dedicated IP Address
A unique IP address used exclusively for your email sending, isolating your reputation from other senders.
Shared IP Address
An IP address used by multiple email senders, common with entry-level email service providers.
Email Authentication
Technical protocols (DKIM, SPF, DMARC, BIMI) that verify an email's sender identity to prevent spoofing and phishing.
BIMI (Brand Indicators for Message Identification)
A standard that enables verified brand logos to appear next to emails in supported inbox clients.
PTR Record (Reverse DNS)
A DNS record mapping an IP address back to a hostname, used by receiving mail servers to verify sender legitimacy.
CASL (Canada's Anti-Spam Legislation)
Canadian law requiring express consent before sending commercial electronic messages to Canadian recipients.
DPDP Act (India Digital Personal Data Protection)
India's data protection law governing how businesses collect, process, and protect personal data of Indian residents.
Consent Management
The process of collecting, storing, and honoring subscriber consent for marketing communications.
Right to Erasure (Right to be Forgotten)
A legal right under GDPR and similar laws allowing individuals to request deletion of all their personal data.
Data Processing Agreement (DPA)
A legally binding contract between a business and its email service provider governing how personal data is processed.
Abandoned Cart Email
An automated email sent to shoppers who added items to their cart but didn't complete the purchase.
Post-Purchase Email
An automated email series sent after a customer purchases, designed to confirm, delight, and upsell.
Win-Back Campaign
A targeted email campaign to re-engage customers who haven't purchased or engaged in a defined period.
Product Recommendation Email
Personalized emails featuring products selected based on a subscriber's browsing history or purchase patterns.
Flash Sale Email
A time-limited promotional email creating urgency with a short-window discount or exclusive offer.
Email Outreach
The practice of sending cold or warm emails to prospects, partners, or journalists to build relationships or drive sales.
Follow-up Email
An email sent after an initial message or meeting to continue a conversation, check in, or prompt action.
Personalization at Scale
Using data and automation to personalize email content for thousands of recipients simultaneously.
Email Cadence
The structured frequency and timing of emails in a sales or marketing sequence.
B2B Email Marketing
Email marketing strategies and tactics designed specifically for business-to-business sales and communication.
AI Subject Line Generator
AI tool that automatically writes and tests email subject lines optimized for open rates.
AI Email Writer
Artificial intelligence that generates email copy, sequences, and campaign content from a brief or template.
Marketing Automation
Software that automates repetitive marketing tasks across email, SMS, social media, and other channels.
Lead Scoring
A methodology for ranking prospects based on their behavior and demographic fit to prioritize sales outreach.
CRM Integration
Connecting your email marketing platform to a CRM system to sync contacts, deals, and engagement data bidirectionally.
Email Deliverability Testing
Testing emails before sending to identify spam filter triggers, rendering issues, and deliverability risks.
Email Preview
Rendering your email across multiple email clients and devices before sending to check for visual consistency.
Email Design System
A library of reusable email components, styles, and templates that ensure brand consistency across all campaigns.
AMP Email (Accelerated Mobile Pages)
An email format that supports interactive, dynamic content like forms, carousels, and live data within the email itself.
Email Footer
The bottom section of an email containing the sender's address, unsubscribe link, and legal disclosures.
Subscriber Segmentation
Organizing your email list into targeted groups based on demographics, behavior, preferences, or lifecycle stage.
Email Suppression List
A list of email addresses that should never receive emails — including hard bounces, spam complainers, and unsubscribers.
Email Verification
The process of validating whether an email address is real, deliverable, and not a spam trap before adding it to your list.
Contact Import
The process of uploading an existing list of email subscribers into an email marketing platform.
Email Preference Center
A subscriber self-service page where recipients can manage their email preferences, frequency, and topic subscriptions.
Email Marketing in India
Email marketing practices, regulations, and platforms tailored for Indian businesses and the Indian market.
Transactional vs Marketing Email
The distinction between automated, action-triggered emails (transactional) and promotional content emails (marketing).
Email Account Warming
The process of gradually building up a new email account's sending reputation before large-scale outreach.
Multivariate Testing
Testing multiple variables in an email simultaneously to identify the best-performing combination of elements.
Merge Tags (Personalization Tokens)
Placeholder variables in email templates that are replaced with individual subscriber data when the email is sent.
RFM Segmentation
Segmenting email lists by Recency (last purchase), Frequency (how often they buy), and Monetary (how much they spend).