Email Glossary

APOP (Authenticated Post Office Protocol) is a security extension for POP3 that encrypts login credentials during email retrieval. Unlike standard POP3, which transmits passwords in plain text, APOP uses MD5 hashing comb...

BIMI (Brand Indicators for Message Identification) is an email specification that displays your brand logo next to authenticated emails in recipient inboxes. It works alongside DMARC to verify sender identity and provide...

DKIM (DomainKeys Identified Mail) is an email authentication method that adds a digital signature to outgoing emails. This cryptographic signature allows receiving mail servers to verify that the email was actually sent...

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that builds on SPF and DKIM. It tells receiving servers what to do with emails that fail authentication and prov...

Email authentication is a set of technical protocols and standards that verify the identity of email senders and confirm that messages have not been tampered with during transmission. These authentication mechanisms, inc...

Email authentication is a set of protocols that verify the sender identity of an email message. The three main authentication methods are SPF, DKIM, and DMARC, which work together to prove that emails actually come from...

Email encryption is the process of encoding email messages and attachments to protect their contents from unauthorized access during transmission and storage. It transforms readable plaintext into scrambled ciphertext th...

An email header is the metadata section attached to every email message that contains essential routing and authentication information. Headers include sender and recipient addresses, timestamps, subject lines, and a det...

An Email OTP (One-Time Password) is a temporary, time-sensitive code sent to a user's email address for identity verification. Unlike static passwords, OTPs expire after a single use or short time window (typically 5-15...

Gmail is a free email service developed by Google that launched in 2004 and has grown to become the world's most popular email platform with over 1.8 billion users. It offers robust spam filtering, 15 GB of free storage,...

S/MIME (Secure/Multipurpose Internet Mail Extensions) is a widely adopted standard for encrypting and digitally signing email messages. It uses public key cryptography to provide end-to-end encryption, ensuring only inte...

SPF (Sender Policy Framework) is an email authentication protocol that allows domain owners to specify which mail servers are authorized to send emails on behalf of their domain. Receiving servers check SPF records to ve...

SSL (Secure Sockets Layer) is a cryptographic protocol that encrypts the connection between email clients and email servers, ensuring that transmitted data remains private and cannot be intercepted by unauthorized partie...