Glossary
- Abuse desk
- ARC (Authenticated Received Chain)
- Authentication-Results header
- Back pressure
- BIMI
- Bounce classification
- Bounce processing
- Bounce
- Bulk sender requirements
- Cloud-native email infrastructure
- Commercial MTA
- Complaint rate
- DANE (for SMTP)
- Deferral
- Deliverability
- DeliverabilityOps
- Delivery event logs
- Delivery Status Notification (DSN)
- Delivery vs deliverability
- DKIM (DomainKeys Identified Mail)
- DKIM selector
- DMARC alignment
- DMARC
- DNSBL / blocklist (RBL)
- Domain warmup
- Egress proxy (for sending)
- Email API
- Email infrastructure
- Email Service Provider (ESP)
- Engagement
- Envelope sender (Return-Path / bounce address)
- Feedback loop (FBL)
- Gateway MTA (edge MTA)
- Greylisting
- Header From
- High availability (HA)
- Horizontal scaling
- Inbound vs outbound mail
- Inbox placement
- Injection (message injection)
- IP pool
- IP reputation vs domain reputation
- IP warmup
- ISP (in email usage)
- List hygiene
- List-Unsubscribe / one-click unsubscribe
- Mail Delivery Agent (MDA)
- Mail queue
- Mail Submission Agent (MSA)
- Mail Transfer Agent (MTA)
- Mail User Agent (MUA)
- Mailbox provider (MBP)
- MailOps engineer / deliverability engineer
- MailOps
- Message expiry (max age)
- MIME
- MTA migration
- MTA-STS
- MTA vs ESP
- Multi-tenancy (in sending infrastructure)
- MX (Mail Exchanger) record
- MX rollup
- Null MX
- Observability (in email infrastructure)
- Open-source MTA
- Out-of-band (OOB) bounce
- Postmaster tools
- Postmaster
- Promotional (marketing) email
- PTR record (reverse DNS)
- Queue architecture
- Rate limiting (email)
- Received header (trace chain)
- Retry schedule / exponential backoff
- Routing policy
- Seed list testing
- Self-hosted email infrastructure
- Sender reputation
- Shared vs dedicated IPs
- Smarthost
- SMTP envelope
- SMTP relay
- SMTP response codes
- SMTP (Simple Mail Transfer Protocol)
- Spam trap
- SPF (Sender Policy Framework)
- Spool
- STARTTLS
- State of MailOps
- Submission ports (25, 587, 465)
- Suppression list
- TLS-RPT
- Traffic shaping automation
- Traffic shaping
- Transactional email
- VERP (Variable Envelope Return Path)
- Virtual MTA (VMTA)