Email Library for C# and VB.NET Applications

System Requirements

GemBox.Email requires only .NET, it doesn't have any other dependency.
You can use it on:

• .NET Framework 3.5 - 4.8
• .NET Standard 2.0 (.NET 5 & 6)

Hello World

The first step in using the GemBox.Email library is to add a reference to GemBox.Email.dll in your C# or VB.NET project. There are three ways how to do that.

a) Add from NuGet:

You can add GemBox.Email as a package by using the following command from the NuGet Package Manager Console:

Install-Package GemBox.Email

Or you can search and add GemBox.Email from the NuGet Package Manager.

b) Or add from DLL file:

You can download GemBox.Email.dll file from this page and add a reference by browsing to it.

c) Or add from Setup:

You can download the GemBox.Email Setup from this page. After installing the setup, you can add a reference to GemBox.Email.dll from the Global Assembly Cache (GAC).

The second step is to add a directive for the GemBox.Email namespace.

For a C# project, use: using GemBox.Email;
For a VB.NET project, use: Import GemBox.Email

The third step is to set the license key to use GemBox.Email in one of its working modes.

To use a Free mode in a C# project, use: ComponentInfo.SetLicense("FREE-LIMITED-KEY");
To use a Free mode in a VB.NET project, use: ComponentInfo.SetLicense("FREE-LIMITED-KEY")

You can read more about GemBox.Email's working modes on the Evaluation and Licensing help page.

The last step is to write your application-specific email code, like the following example code that shows how to connect to your email server and download a mail message from it.

using System;
using GemBox.Email;
using GemBox.Email.Pop;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        using (PopClient pop = new PopClient("<ADDRESS> (e.g. pop.gmail.com)"))
        {
            // Connect and login.
            pop.Connect();
            Console.WriteLine("Connected.");

            pop.Authenticate("<USERNAME>", "<PASSWORD>");
            Console.WriteLine("Authenticated.");

            // Check if there are any messages available on the server.
            if (pop.GetCount() == 0)
                return;

            // Download message with sequence number 1 (the first message).
            MailMessage message = pop.GetMessage(1);

            // Display message sender and subject.
            Console.WriteLine();
            Console.WriteLine($"From: {message.From}");
            Console.WriteLine($"Subject: {message.Subject}");

            // Display message body.
            Console.WriteLine("Body:");
            string body = string.IsNullOrEmpty(message.BodyHtml) ?
                message.BodyText :
                message.BodyHtml;
            Console.WriteLine(body);
        }
    }
}

Imports System
Imports GemBox.Email
Imports GemBox.Email.Pop

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        ComponentInfo.SetLicense("FREE-LIMITED-KEY")

        Using pop As New PopClient("<ADDRESS> (e.g. pop.gmail.com)")

            ' Connect and login.
            pop.Connect()
            Console.WriteLine("Connected.")

            pop.Authenticate("<USERNAME>", "<PASSWORD>")
            Console.WriteLine("Authenticated.")

            ' Check if there are any messages available on the server.
            If pop.GetCount() = 0 Then Exit Sub

            ' Download message with sequence number 1 (the first message).
            Dim message As MailMessage = pop.GetMessage(1)

            ' Display message sender and subject.
            Console.WriteLine()
            Console.WriteLine($"From: {message.From}")
            Console.WriteLine($"Subject: {message.Subject}")

            ' Display message body.
            Console.WriteLine("Body:")
            Dim body As String = If(String.IsNullOrEmpty(message.BodyHtml),
                message.BodyText,
                message.BodyHtml)
            Console.WriteLine(body)

        End Using

    End Sub

End Module