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Email audit logs are log files that record email system operational behaviors, used for security monitoring, compliance auditing, incident investigation, and system maintenance, covering user operations, email metadata, geographical locations, and other information, serving as an important tool for ensuring information security and compliance management.

Blacklists (RBL/DNSBL) are technologies used in email systems to identify and block spam sources, providing real-time lists of flagged IPs through DNS, helping to filter spam and ensure email security.

Distribution groups are a basic function in email systems, used to send emails to multiple users at once, improving internal communication efficiency in enterprises.

A mail queue is a temporary storage area in email servers that holds emails that have not been successfully delivered, ensuring the stability and reliability of email transmission.

A mail server is the core of an email system, responsible for sending, receiving, and storing emails, supporting personal and business communications, and becoming more intelligent and efficient in the future.

A mail storage backend is the core component in email systems responsible for email storage, management, and access, supporting multiple protocols, high concurrency, and security, affecting the stability and user experience of email services.

A resource mailbox is a special mailbox in enterprise email systems used to manage resources such as meeting rooms and equipment, supporting automated booking and calendar integration, improving resource scheduling efficiency and collaboration experiences.

A shared mailbox allows multiple users to collaboratively manage the same mailbox, improving team communication efficiency, suitable for customer service, sales, HR, and other scenarios, supporting permission management and unified email image.

A whitelist is a security mechanism used to allow access to resources from specific trusted sources, widely applied in email filtering and network security, enhancing security and email deliverability.

An email signature is information appended to the end of an email, used to display the sender’s identity, contact information, and brand image, serving to enhance professional image, facilitate communication, and promote brand awareness.