Email Glossary

Understand the key terms in email verification, deliverability, authentication, and email marketing.

A blacklist is a list of IP addresses or domains associated with spam, malicious email activity, or other behavior that may indicate a risk to email delivery.

Bounce rate is the percentage of sent emails that could not be delivered to the recipient's mail server.

Bulk email verification is the process of checking a large list of email addresses at once to identify which are valid, invalid, or require further review.

A catch-all email address is an address on a domain configured to accept messages sent to addresses that may not correspond to individual mailboxes.

A disposable email address is a temporary email address created for short-term use.

An email address is a unique identifier used to send and receive email messages. It typically consists of a local part, the @ symbol, and a domain.

Email bombing is the deliberate sending of a very large number of emails to a single email address within a short period.

An email bounce occurs when an email cannot be delivered to the intended recipient and the receiving mail server rejects or returns the message.

Email checking is the process of reviewing an email address to identify problems that could prevent successful delivery.

An email client is an application or program that allows you to send, receive, organize, and manage email messages.

Email deliverability is the ability of an email to reach the recipient's inbox rather than being blocked, rejected, or sent to spam by the recipient's email provider.

Email marketing is the use of email to communicate with customers, prospects, subscribers, or other contacts for business purposes.

An email validation API is a developer tool that allows a website or application to check an email address before accepting or sending it.

Email validation is the process of verifying whether an email address is correctly formatted, associated with a valid domain, and capable of receiving email.

Email verification is the process of checking whether an email address is valid and likely to accept email.

The General Data Protection Regulation (GDPR) is a data protection law that sets rules for how organizations collect, use, store, and manage personal data.

IP reputation reflects the sending history and behavior of an IP address used to send email.

An Internet Protocol (IP) address is a numerical identifier assigned to a device or server on a network.

A Mail Transfer Agent (MTA) is software that transfers email messages between mail servers.

An MX (Mail Exchange) record is a DNS record that specifies which mail server is responsible for receiving email for a domain.

Phishing is an attempt to steal sensitive information by pretending to be a trusted person, company, or organization.

Real-time email verification is the process of evaluating an email address as it is submitted through a website form, application, or signup page.

SMTP validation uses SMTP communication to evaluate how a recipient's mail server responds to an email address.

A whitelist, also called an allowlist, is a list of approved email addresses, domains, or IP addresses that an email system recognizes as trusted.