Deliverability Glossary
Terms Every Email Expert Needs to Know
- 404-compliant
- Abandoned Cart
- Above-the-fold
- A/B test
- Accelerated Mobile Pages (AMP)
- Acceptable Usage Policy (AUP)
- Acceptance Rate
- Access Provider
- Account Takeover (ATO)
- Address Book
- Administrative Management Domain (ADMD)
- Advanced Encryption Standard (AES)
- Advance-Fee Scam
- Aggregate Reports
- Alignment
- Allowlist
- Alt Text
- AMP Email
- Angler Phishing
- Anonymised data
- Anti-Phishing Working Group (APWG)
- Anti-relay
- Anti-Spam
- Anti-Spam SMTP Proxy (ASSP)
- Apple Mail Privacy Protection (MPP)
- Application Programming Interface (API)
- A Record
- Asymmetric Cryptographic Algorithm
- Authenticated Received Chain (ARC)
- Authentication
- Author Domain Signing Practices (ADSP)
- Auto-ignore
- Autonomous System (AS)
- Autonomous System Number (ASN)
- Autoresponder
- Average Open Rate
- Backscatter
- Baiting
- Bayesan Poisoning
- Bayesian filter
- Bayesian Filters
- Blacklisting
- Block
- Blocking policy
- Blocklist
- BoF (Birds of a Feather)
- Border Gateway Protocol (BGP)
- Botnet
- Bots
- Bounce
- Bounce Rate
- Brand Indicators for Message Identification (BIMI)
- Broadcast
- Brute-Force Attack
- Buffer Overflow
- Bulk Mail
- Business Email Compromise (BEC)
- California's Consumer Privacy Act (CCPA)
- Call to Action (CTA)
- Campaign
- Canada's Anti-Spam Legislation (CASL)
- CAN-SPAM Act
- Carding
- Cartooney
- Cascading style sheet (CSS)
- Catch-all
- Catch-it-as-you-can
- Cats and Coffee warning
- CEO Fraud
- Chew toy
- Chickenboner
- Churn rate
- Classless Inter-Domain Routing (CIDR)
- Clickbait
- Click Rate
- Click-Through Rate (CTR)
- Click to Open Rate (CTOR)
- Click Tracking Domain
- Clipping
- Cloudmark
- Cloudmark Network Classifier (CNC)
- CNAME record
- COALMINE
- Cold email
- Cold Reputation
- Common Mark Certificate (CMC)
- Complaint rate
- Complaints
- Completely Automated Public Turing Test to Tell Computers and Humans Apart (CAPTCHA)
- Computer Security Incident Response Team (CSIRT)
- Confirmation Message
- Consent
- Contact
- Content Filters
- Conversion rate (CVR)
- Cookies
- Cousin Domain
- Cross site scripting (XSS)
- Cryptocurrency
- Cryptographic Signature
- Cryptojacking
- Customer Data Platform (CDP)
- Cut it out, Ron
- Cyber Security
- Cybersecurity Law (CSL)
- Cyber Threat
- Data Breach
- Data Leak
- Data Processor
- Data Security Law of the People's Republic of China (DSL)
- Dedicated IP
- Deferral
- Deliverability
- Delivery
- Delivery Rate
- Deployment
- Dial-up/Dynamic User List (DUL)
- Digest
- Digital Marketing
- Direct Email Marketing (DEM)
- Direct Mail Marketing
- Direct Marketing
- Dirty Mailing List
- Display Name
- Display Name Attack
- Disposable/Temporary Email Address (DEA)
- Distributed Checksum Clearinghouses (DCC)
- Distributed Denial-of-Service (DDoS)
- Distribution List
- DKIM alignment
- DMARC Alignment
- DMARC tags
- DNS-based Authentication of Named Entities (DANE)
- DNS Cache Poisoning
- DNS Spoofing
- Domain-based Message Authentication, Reporting, and Conformance (DMARC)
- Domain Block
- Domain Blocklist (DBL)
- DomainConnect
- DomainKeys (DK)
- DomainKeys Identified Mail (DKIM)
- Domain Management Function (DMF)
- Domain Message Authentication Reporting & Conformance (DMARC)
- Domain Name
- Domain Name System (DNS)
- Domain Name System Security Extensions (DNSSEC)
- Domain Owner
- Domain Reputation
- Double Opt-In (DOI)
- Doxing
- Drip campaign
- Dunning email
- Dynamic content
- E-commerce
- Email Address Internationalization (EAI)
- Email Analytics
- Email Automation
- Email blast
- Email client
- Email Harvesting
- Email Hijacking
- Email Marketing
- Email Queue
- Email Service Provider (ESP)
- Email Verification
- Encryption
- End User
- Engagement
- Ethical Hacking
- Express consent
- Extended Simple Mail Transfer Protocol (ESMTP)
- Extensible Markup Language (XML)
- False International Transfer Orders (FOVI)
- False negative
- False positive
- Feedback Loop (FBL)
- Final Ultimate Solution to the Spam Problem (FUSSP)
- Fire and Forget
- Firewall
- Footer
- Forensic reports
- Forward
- Forward Confirmed Reverse DNS (FCrDNS)
- Frea speach
- From Header
- Fully Qualified Domain Name (FQDN)
- General Data Protection Regulation (GDPR)
- General Law for Personal Data Protection (LGPD)
- Graymail
- Greylisting
- Hacktivism
- Ham
- Hard Bounce
- Hash Blocklist
- HashCash
- Header
- Header From Address (RFC5322.FROM)
- Heat Map
- Heuristic Analysis
- HMAC-SHA256
- Honeypot
- HTTP Parameter Pollution (HPP)
- Hyper text markup language (HTML)
- Identifier Alignment
- Implied consent
- Inbox Placement Rate (IPR)
- Incident Reporting
- Incident Response
- Indirect Mailflow
- Infrastructure
- Intermediary
- Internet Engineering Task Force (IETF)
- Internet message access protocol v.4 (IMAP4)
- Internet Service Provider (ISP)
- IP Address
- IP Block
- IP Pool
- IP Reputation
- Joe job
- JPG
- Junk Mail Reporting (JMR)
- Key performance indicator (KPI)
- Key Rotation
- Landing Page
- Lead
- Lifecycle emails
- Lifetime value (LTV)
- List Bombing
- List broker
- List Churn
- List Cleaning
- List Cleaning Services
- List Fatigue
- List growth rate
- List Harvesting/Scraping
- List Hygiene
- List Maintenance
- List Purchase
- List Rental
- List-Unsubscribe
- List washing
- Listwashing
- Live Trap
- Local Area Network (LAN)
- Local Policy or Local Policy Override
- Lookalike Domain
- Lumber Cartel
- Mail Abuse Prevention Systems (MAPS)
- Mailbox Provider (MBP)
- Mail Exchange Record (MX)
- Mailflow
- Mailing List
- Mail Transfer Agent (MTA)
- Mail Transfer Agents – Strict Transport Security (MTA-STS)
- Mail User Agent (MUA)
- Mainsleaze
- Malicious Actor
- Malicious Content
- Malvertising
- Malware
- Managed Security Service Provider (MSSP)
- Marketing Automation
- Message Receiver
- Message Sender
- Message Submission Agent (MSA)
- Messaging Abuse Complaint
- Messaging Compliance
- Messaging, Malware and Mobile Anti-Abuse Working Group (M3AAWG)
- Metasploit
- Metropolitan Area Network (MAN)
- Mis-delivery
- Multi-Factor Authentication (MFA)
- Multi-Purpose Internet Mail Extensions (MIME)
- Multivariate Testing
- Netscum
- Newsletter
- Nonhuman Interactions (NHI)
- Obfuscation
- Onboarding
- Open Rate
- Open Web Application Security Project (OWASP)
- Opt-down
- Opt-in
- Opting Out
- Opt-out
- Organizational Domain
- Originator
- Out of Band Bounces (OBB)
- Password
- Permission Marketing
- Permission Policy
- Personal Information Protection Law of the People’s Republic of China (PIPL)
- Personalization
- Personally Identifiable Information (PII)
- Pharming
- Phishing
- Phishing Susceptibility Framework
- Pink contract
- Pointer Record (PTR)
- Portable Network Graphics (PNG)
- Posta elettronica certificata (PEC)
- Postmaster
- Post Office Protocol v.3 (POP3)
- Preference Center
- Pretty Good Privacy (PGP)
- Preview Pane
- Pristine Spam Trap
- Privacy and Electronic Communications Regulations (PECR)
- Promotions tab
- Prospect
- Public Suffix List (PSL)
- Purchased List
- QR Code Phishing
- Quoted-Printable
- Ransomware
- Ratware
- Razor2
- reCAPTCHA
- Receiver
- Receiving MTA
- Recipient
- Recycled Spam Trap
- Re-engagement Campaign
- Remediation
- Remote Access Trojan (RAT)
- Render
- Reply-to Address
- Reporter
- Report Generator
- Report Processor
- Request For Comments (RFC)
- Réseaux IP Européens (RIPE)
- Responsive design
- Return on investment (ROI)
- Return-Path
- Reverse DNS (rDNS)
- Reverse Domain Name Hijacking (RDNH)
- Reverse Social Engineering
- RFC1034
- RFC1869
- RFC2142
- RFC2369
- RFC2821
- RFC2822
- RFC3463
- RFC4407
- RFC4408
- RFC4592
- RFC4870
- RFC4871
- RFC5321
- RFC5322
- RFC5335
- RFC6376
- RFC6532
- RFC7208
- RFC7489
- RFC7960
- Rich Communication Services (RCS)
- Robocalling
- Rootkit
- RSA
- RSA-SHA256
- Rspamd
- RUA
- Safe Senders
- Same-Domain Phishing
- Scareware
- Secure Email Gateway (SEG)
- Secure/Multipurpose Internet Mail Extensions (S/MIME)
- Secure Socket Layer (SSL)
- Security Awareness Training
- Seed email
- Segmentation
- Sender
- Sender ID (SID)
- Sender Name
- Sender Policy Framework (SPF)
- Sender Reputation Data (SRD)
- Sender Score
- Send frequency
- Sending Domain
- Sending MTA
- Session Hijacking
- SHA256
- Shared IP
- Shoulder Surfing
- Signup form
- Simple Mail Transfer Protocol (SMTP)
- Simulated Phishing
- Single Opt-In (SOI)
- Single Sign On (SSO)
- Smart host
- Smart Network Data Services (SNDS)
- Smishing
- Snowshoeing
- Social Engineering
- Soft Bounce
- Solo Ads
- Source
- Spam
- SpamAssassin
- Spambot
- Spam Complaint
- Spam Folder
- Spamhaus
- Spammer
- Spam Placement
- Spam Score
- Spam Trap
- Spamware
- Spear Phishing
- SPF flattening
- Spoofing
- Spray and Pray
- Spyware
- SQL injection (SQLI)
- StartTLS
- Statistical Relevance
- Steganography
- Stop, look and listen
- Subaddressing
- Subdomain
- Subject line
- Suppression List
- Sybil Attack
- Targeted Attack
- Teergrubing
- There is no Lumber Cartel (TINLC)
- There is no We (TINW)
- This Is Not Spam (TINS)
- Throttling
- Time To Live (TTL)
- Top Level Domain (TLD)
- Tracking
- Tracking Pixel
- Transactional Email
- Transmission Control Protocol/Internet Protocol (TCP/IP)
- Transport Layer Security (TLS)
- Triggered email
- Trojan
- Turing Test
- Two Factor Authentication (2FA)
- TXT Record
- Typo-squatting
- Typo Trap
- Uniform Domain Name Dispute Resolution Policy (UDRP)
- Uniform Resource Identifier (URI)
- Unique clicks
- Unknown User
- Unsolicited Traffic
- Unsubscribe
- URL Obfuscation
- URL Shortening
- User Experience (UX)
- Variable envelope return path (VERP)
- Vendor Email Compromise (VEC)
- Verified Mark Certificate (VMC)
- Virtual Mail Transport Agent (VMTA)
- Virus
- Vishing
- Warming Up
- Warm Reputation
- Webmail
- Welcome email
- Whack-a-Mole
- Whale Phishing
- Whitelisting
- Wide Area Network (WAN)
- Wildcard DNS Record
- Win-back email
- Word-of-Mouth Marketing (WOM Marketing)
- X-Header
- X-Mailer
- Zero-day Exploit
- Zero-day Vulnerability