Spire.Email for is a standalone software library (API) designed for .NET developers to create, read, send, and manipulate email messages and attachments. It supports major email protocols (SMTP, POP3, IMAP) and a wide range of email and Microsoft Outlook file formats (MSG, EML, EMLX, MHTML, PST, OST, TNEF). The library does not require Microsoft Outlook to be installed and is compatible with various .NET platforms, including .NET Framework, .NET Core, .NET Standard, MonoAndroid, and Xamarin iOS. It enables developers to manage emails and folders, perform file format conversions, and handle mailbox information efficiently, making it suitable for integration into custom .NET applications for comprehensive email management.

Key Features

Email Creation and Manipulation Create, edit, and send emails with attachments and HTML/text bodies.

• Compose plain or HTML emails
• Add, extract, and delete attachments
• Specify recipients (To, CC, BCC), subject, and reply-to addresses

Protocol Support Send and receive emails using standard protocols.

• SMTP, POP3, and IMAP support
• SSL and TLS security
• Connection timeout handling

File Format Compatibility Work with various email and Outlook formats.

• Read, save, and convert MSG, EML, EMLX, MHTML, PST, OST, TNEF files
• File format conversion between EML, MSG, and MHTML

Mailbox and Folder Management Manage mailbox and folders programmatically.

• Retrieve, delete, and list messages from servers
• Get mailbox info (message count, size, unique IDs)
• Create, delete, select, and rename folders (IMAP)

Outlook Storage Manipulation Handle Outlook storage files without Microsoft Outlook.

• Manipulate PST and OST files
• Extract information and attachments

Platform Compatibility Integrate with a wide range of .NET environments.

• Supports .NET Framework (2.0–5.0), .NET Core, .NET Standard, MonoAndroid, Xamarin iOS, and more
• 32-bit and 64-bit application support

Security and Independence No dependency on Microsoft Office or Outlook.

• Improved security, stability, and scalability compared to Office Automation

Benefits

Developer Productivity Simplifies integration of email features into .NET applications.

• Reduces development time for email-related functionality
• Eliminates the need for external dependencies like Outlook

Broad Compatibility Supports multiple platforms and formats.

• Ensures flexibility for various deployment scenarios
• Enables handling of diverse email storage and message types

Enhanced Security and Performance Operates independently of Microsoft Office.

• Avoids security risks and overhead of Office Automation
• Provides reliable and scalable email management

Comprehensive Email Management Full-featured email and mailbox operations.

• Enables advanced email workflows and automation
• Supports enterprise-level email processing needs