Email glossary

A compilation of all the concepts you need to know to become an emailing expert, explained in the simplest way possible.

Browse definitions by letter

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2-Step Authentication

What 2-step authentication is, how it enhances security, and why it is essential for protecting online accounts.

A

Alias Email

The meaning and example of an alias email: an alternate email address that forwards to your primary address.

Alternative Email Address

An alternative email address: meaning, example, and the importance of having an alternative email account.

Analytics for Email

What email analytics are, their common metrics, examples of usage, and how analytics improve email marketing performance.

AOL Mail

Learn about AOL Mail, its key features, the differences with AOL Basic Mail for older browsers, and the maximum attachment size for sending files.

Auto-Fill Email Address

What auto-fill an email address means, how to enable and manage it in various email providers, and tips for keeping your contacts organized.

Automated Email Reply

What an automated email reply is, how it works, types of automated responses, and how to set them up in Gmail and Outlook.

B

Blind Carbon Copy

What BCC means in email, the difference between CC and BCC, when to use BCC for privacy, and how to use BCC in Gmail and Outlook.

C

CAN-SPAM Act

What the CAN-SPAM Act is, explaining its key principles and how it regulates commercial emails to protect consumers from unwanted messages.

Canned Email

What a canned email is, its uses, how to create canned email templates in Gmail, and benefits of using canned responses.

Catch-All Email Address

What a catch-all email address is, how it works, and how to create a catch-all address with various email service providers.

Custom Email Domain

Discover what a custom email domain is, its benefits for professional communication, and how to set one up.

D

Disposable Email Address

The meaning of a disposable email address, how it protects your privacy, and its common uses for temporary communications.

DKIM

What DomainKeys Identified Mail (DKIM) is, its purpose, how it works, and the benefits of using DKIM for email authentication.

DMARC Record

The meaning of a DMARC record, its role in email authentication, how DMARC works, and the benefits of implementing DMARC policies.

Dynamic Email

What dynamic email is, its benefits, and how to use dynamic content in Gmail for personalized, interactive communications.

E

Email Account

What is an email account, the basics of setting it up, and how to manage an individual email user account.

Email Fatigue

What email fatigue means, its main symptoms, common causes, and ways to manage and prevent it in your daily life.

Email Service Provider

What an email service provider (ESP) means, how it works, and popular free email service providers to consider.

Email Throttling

What email throttling is, benefits, when to use it, and best practices for managing large email sends to avoid being marked as spam.

Email Triage

What email triage is, its meaning, system, and workflow. Discover the email triage process, and tips for better email management.

F

Flagged as Spam

What does it mean when an email is flagged as spam, common causes, ways to check if your email is flagged, and tips for avoiding spam flags.

G

GDPR

Understand what GDPR is, who it applies to, and how businesses can comply with this stringent data privacy and security law.

H

Host Name for Email

What a host name for email is, how it works for IMAP and SMTP, and how to find the host name for email providers like Gmail, Outlook, and Yahoo Mail.

HTML Email

What an HTML email is, examples, and how to create and embed HTML in your emails to enhance their design.

I

IMAP

The meaning of IMAP, how to enable it on different email clients, and the benefits of using IMAP for email management.

Inbox

What an Inbox folder is and how it helps to manage and prioritize incoming email messages efficiently.

Inbox Decluttering

What inbox decluttering is, why it’s important, best decluttering methods, and how Clean Email can help declutter and organize your inbox.

Inbox Rule

The meaning of an inbox rule, common types, and how to set up rules in Gmail to automate email management.

J

There are no entries for this letter.

K

There are no entries for this letter.

L

List Cleaning

What email list cleaning is, why it's important for deliverability, and methods for effectively cleaning and maintaining your email list.

M

Mail Loop

Discover what a mail loop is, its causes, how to fix related issues, and how to resolve 'hop count exceeded' errors.

Migration in Email

The meaning of email migration, the steps involved, how long it takes, and how to perform personal and business email migrations.

Mail Merge

What mail merge is, how it personalizes bulk emails, and the steps to use it in Gmail for efficient communication.

Mass Email Sending

Discover what mass email sending is, how it works in Gmail and Outlook, and the best practices for effective bulk emailing.

MX Record

The meaning of an MX record, its key functions in email routing, and how to find and check MX records using various tools.

N

Newsletter

The meaning of a newsletter email, how it engages subscribers, and why it's a powerful tool in digital marketing.

Non-Delivery Report

What a Non-Delivery Report (NDR) is, why email delivery failures occur, how to find NDRs, and steps to address common delivery issues.

Noreply Email Address

Discover what a noreply email address is, why organizations use it, benefits of using noreply addresses, and guidelines for setting one up.

O

Outbox

The meaning of the Outbox folder, an example, and the function of an outbox storage folder in email.

Other Inbox in Outlook

What the Other inbox in Outlook is, the purpose of the feature, how to locate it, and a guide to disabling it.

P

Phishing Email

What a phishing email is, common signs of phishing, and what the practical steps to identify and report phishing attempts are.

POP3 Email Protocol

Explore what the POP3 email protocol is, its benefits, and how it differs from IMAP in email management.

Primary Email

The meaning of the Primary Email account, example, and its importance in managing your communications.

Priority Inbox

The meaning of Priority Inbox, how Gmail uses it to highlight your important emails, and steps to disable it.

Proton Mail

What Proton Mail is, its mobile version, and how it's used for secure personal and business communication with end-to-end encryption.

R

Read Receipt

The meaning of a read receipt, how they work, how to enable read receipts in Gmail and Outlook, and the benefits of using them.

Reverse DNS Lookup

What a reverse DNS lookup is, how to perform it using Command Prompt or Terminal, and how to verify reverse DNS results.

S

Storage Space

What email storage space is, its impact on your inbox, how to manage it efficiently, and options for expanding storage with popular email providers.

SMTP Server

The meaning of an SMTP server, how it facilitates email sending, and the key ports used for secure connections.

Snooze an Email

What snoozing an email means, how it works to temporarily remove emails from your inbox, and steps to snooze emails in Gmail and Outlook.

Spam Email

What spam email means, how to report it, and explaining the dangers spam poses to your online security.

T

Trash Folder

Discover the Trash folder: a dedicated space for deleted emails in your mailbox, how it works, and how to manage it effectively.

U

Undisclosed Recipient

What an undisclosed recipient is, why it's used for privacy, and how to send emails to undisclosed recipients in Gmail and Outlook.

Unsnooze an Email: Definition

What unsnoozing an email means, how it returns emails to your inbox immediately, and steps to unsnooze emails in Gmail and Outlook.

Unsolicited Email

What unsolicited email means, examples of unsolicited emails, and how to stop bulk unwanted messages using Clean Email's Screener tool.

V

Verification Email

What a verification email is, its importance for engagement and security, how it works, and why verification codes might not be received.

W

Webmail

Discover what webmail is, its main advantages over email clients, and how to access your webmail account easily.

X

There are no entries for this letter.

Y

Yellowlisting

What yellowlisting means, how it works to differentiate between good and bad emails, and why some servers are yellowlisted instead of blacklisted.

Yahoo Mail

Yahoo Mail’s free service and premium plans explained, along with key features like account security with Account Key, and attachment size limits.

Z

Zapier

Discover how Zapier connects apps to automate tasks, how Zaps work, and the definitions of tasks and integrations within Zapier’s workflow automation.

Zoho Mail

What Zoho Mail is, its features for custom domain hosting, email management tools, and how it’s used for personal and business communication.