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Email Sending Concepts
Welcome to the BlueFox Email Glossary! Here you'll find definitions and explanations for common email marketing, development, and authentication terms organized alphabetically.
B
Bounce Rate
The percentage of emails that failed to reach recipients' inboxes, serving as a critical metric for deliverability and sender reputation.
Bulk Email Sending
Bulk email sending is the practice of distributing a single message to many recipients at once, used for marketing campaigns, newsletters, and announcements.
Bounces
An email bounce occurs when an email is rejected by the recipient's server and returned to the sender, impacting deliverability and sender reputation.
C
Complaints
Email complaints occur when recipients mark messages as spam, indicating dissatisfaction with the content or sender, which can harm sender reputation.
CNAME Record
DNS records that create domain aliases by pointing one domain name to another, simplifying email service management.
D
Deliverability
The measure of email success in reaching recipients' inboxes rather than spam folders or being blocked entirely.
DKIM (DomainKeys Identified Mail)
An email authentication method that adds a digital signature to verify the email hasn't been altered.
DNS (Domain Name System)
The internet's phone book that translates domain names into IP addresses and stores critical email configuration records.
DMARC (Domain-based Message Authentication, Reporting & Conformance)
A protocol that uses SPF and DKIM to protect domains from unauthorized use.
Domain Reputation
Domain reputation is the trust score mailbox providers assign to a sending domain, directly impacting inbox placement and deliverability.
E
Email Authentication
Methods and protocols used to verify the legitimacy of email senders and messages.
Email Headers
Hidden metadata that travels with email messages, containing vital information about routing, authentication, and technical properties.
Email Spoofing
The forgery of an email header to make messages appear to come from a trusted source.
H
Hard Bounce
A permanent email delivery failure that indicates the email address is invalid or no longer exists, requiring immediate removal from mailing lists.
I
IMAP (Internet Message Access Protocol)
An email retrieval protocol that keeps messages on the server, allowing synchronization across multiple devices.
IP Reputation
IP reputation is the rating assigned to a sending IP address based on its historical email behavior, heavily influencing inbox delivery.
M
MX Record (Mail Exchange Record)
DNS records that specify which mail servers are responsible for accepting email on behalf of a domain.
O
One-Click Unsubscribe
One-Click Unsubscribe allows recipients to instantly opt out of emails with a single click, improving compliance, list quality, and user experience.
P
POP3 (Post Office Protocol version 3)
An email retrieval protocol that typically downloads messages from the server to a local device.
R
Return-Path
The email address to which bounced messages are delivered when an email cannot be delivered.
S
Soft Bounce
A temporary email delivery failure that may resolve with time, often due to full mailboxes, server issues, or message size limits.
SMTP (Simple Mail Transfer Protocol)
The standard protocol used for sending and routing email messages across the internet.
SPF (Sender Policy Framework)
An authentication method that specifies which mail servers are authorized to send email on behalf of your domain.
T
TLS (Transport Layer Security)
A cryptographic protocol that provides secure communication over networks for email transmission.
TXT Record
DNS text records that store email authentication policies like SPF, DKIM, and DMARC to enable secure email delivery.