[MailKit](http://www.mimekit.net/) is a cross-platform, popular open source mail client library for .net. ABP Framework provides an integration package to use the MailKit as the [email sender](Emailing.md).
## Installation
It is suggested to use the [ABP CLI](CLI.md) to install this package. Open a command line window in the folder of the project (.csproj file) and type the following command:
````bash
abp add-package Volo.Abp.MailKit
````
If you haven't done it yet, you first need to install the ABP CLI. For other installation options, see [the package description page](https://abp.io/package-detail/Volo.Abp.MailKit).
## Sending Emails
### IEmailSender
[Inject](Dependency-Injection.md) the standard `IEmailSender` into any service and use the `SendAsync` method to send emails. See the [email sending document](Emailing.md) for details.
> `IEmailSender` is the suggested way to send emails even if you use MailKit, since it makes your code provider independent.
### IMailKitSmtpEmailSender
MailKit package also exposes the `IMailKitSmtpEmailSender` service that extends the `IEmailSender` by adding the `BuildClientAsync()` method. This method can be used to obtain a `MailKit.Net.Smtp.SmtpClient` object that can be used to perform MailKit specific operations.
## Configuration
MailKit integration package uses the same settings defined by the email sending system. So, refer to the [email sending document](Emailing.md) for the settings.
In addition to the standard settings, this package defines `AbpMailKitOptions` as a simple [options](Options.md) class. This class defines only one options:
* **SecureSocketOption**: Used to set one of the `SecureSocketOptions`. Default: `null` (uses the defaults).
**Example: Use *SecureSocketOptions.SslOnConnect***
