C# 调用Outlook发送邮件

添加引用：Microsoft.Office.Interop.Outlook

public class EmailHelper
{
    /// <summary>
    /// 收件人，多个收件人用分号";"隔开
    /// </summary>
    public string MailTo { get; set; }

    /// <summary>
    /// 抄送，多个收件人用分号";"隔开
    /// </summary>
    public string MailCC { get; set; }

    /// <summary>
    /// 密送，多个收件人用分号";"隔开
    /// </summary>
    public string MailBCC { get; set; }

    /// <summary>
    /// 主题
    /// </summary>
    public string MailSubject { get; set; }

    /// <summary>
    /// 内容
    /// </summary>
    public string MailHTMLBody { get; set; }

    /// <summary>
    /// 多个附加用分号";"隔开
    /// </summary>
    public string MailAttachments { get; set; }

    public bool Send()
    {
        try
        {
            Outlook.Application olApp = new Outlook.Application();
            Outlook.MailItem mailItem = (Outlook.MailItem)olApp.CreateItem(Outlook.OlItemType.olMailItem);
            mailItem.To = MailTo;
            mailItem.CC = MailCC;
            mailItem.BCC = MailBCC;
            mailItem.Subject = MailSubject;
            mailItem.BodyFormat = Outlook.OlBodyFormat.olFormatHTML;//内容格式
            mailItem.HTMLBody = MailHTMLBody;
            foreach (var item in MailAttachments.Split(';'))
            {
                mailItem.Attachments.Add(item);
            }
            mailItem.Send();
            mailItem = null;
            olApp = null;
            return true;
        }
        catch (System.Exception ex)
        {
            return false;
        }
    }
}

在使用前需要先在本地的Outlook上配置发送人的用户信息。

Microsoft.Office.Interop.Outlook 官网文档：https://docs.microsoft.com/en-us/dotnet/api/microsoft.office.interop.outlook?view=outlook-pia