Rebex POP3

RebexEmail Tools.NET
Version 8.0.9673 (Jun 25, 2026)

Manage POP3 email with a secure and flexible .NET library.

  • Provides POP3 client capabilities for receiving, listing, and removing emails.
  • Supports various authentication methods including OAuth 2.0 and client certificates.
  • Includes MIME and S/MIME message handling with TLS/SSL security.
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A robust POP3 .NET library for secure and efficient email communication.
Rebex POP3 facilitates communication with POP3 servers, allowing developers to receive, list, and delete emails securely. It handles multiple authentication protocols and supports MIME and S/MIME, ensuring comprehensive email message management with encryption and signature verification.

POP3 Communication

Offers a straightforward API that enables developers to connect to POP3 servers, authenticate, retrieve message lists, download messages, and manage attachments.

Connecting to POP3 Servers

Supports connecting to POP3 servers using standard or encrypted connections, including explicit or implicit TLS/SSL modes. It provides detailed connection and security information.

Authentication Support

Implements various authentication modes such as username/password, CRAM-MD5, DIGEST-MD5, APOP, OAuth 2.0, client certificates, GSSAPI, NTLM, Kerberos, and single sign-on techniques.

Message Operations

Enables retrieval of message lists with sequence numbers and unique IDs, downloading of message headers and contents, as well as deletion and restoration of messages.

Advanced Features

Provides mailbox information retrieval, customization of POP3 behavior through fine-tuning, and support for custom commands.

Events and Asynchronous Operations

Supports event handling for certificate validation, transfer progress, command sent, and response read events. It also offers asynchronous programming patterns including task-based, await operator support, and legacy IAsyncResult methods.

MIME and S/MIME Support

Includes APIs for handling MIME messages and secure S/MIME emails, facilitating signing, encryption, and signature validation based on X.509 certificates and PKCS #7 standards.

TLS/SSL and Certificate Management

Features built-in certificate verification, ability to customize validation, override server names, and manage X.509 certificates including loading, saving, and integration with Windows certificate stores.

Proxy and Custom Socket Support

Works with SOCKS4, SOCKS5, HTTP CONNECT proxies, SSH server proxying, and allows customization of transport layers through ISocket interfaces.

Product Compatibility

Review the details below to ensure this product is supported within your environment.

Component Type

  • .NET

.NET Version

  • .NET 10 LTS
  • .NET 9 STS
  • .NET 8 LTS
  • .NET 5 / .NET Core 3.1
  • .NET 4.8 or earlier

.NET Platform

  • .NET Assembly
  • .NET Class
  • .NET Core 3.1 Assembly

IDE Support

  • Visual Studio