How To Get the SharePoint Default Mail Server/Sender

Couple of methods that will retrieve the default mail server and sender that your Sharepoint web app uses:

//get the server
private string GetSmtpServer()

{
    SPWebApplicationCollection spWebApplicationCollection = SPWebService.ContentService.WebApplications;
    SPOutboundMailServiceInstance smtpServer = new SPOutboundMailServiceInstance();

    if (spWebApplicationCollection != null)
    {
        foreach (SPWebApplication spWebApplication in spWebApplicationCollection)
        {
            smtpServer = spWebApplication.OutboundMailServiceInstance;
            return smtpServer.Server.Address;
        }
    }
    return string.Empty;
}

 
//get the sender
private string GetDefaultSmtpSender()
{
    SPWebApplicationCollection spWebApplicationCollection = SPWebService.ContentService.WebApplications;
    string sender = default(System.String);
    if (spWebApplicationCollection != null)
    {
        foreach (SPWebApplication spWebApplication in spWebApplicationCollection)
        {
            sender = spWebApplication.OutboundMailSenderAddress;
            return sender;
        }
    }
    return string.Empty;
}


 
//sample usage
private void SendEmail(string subject, string msg, string to, string cc)
{
    MailAddress toAddress = new MailAddress(to, "Main Recipient");
    MailAddress fromAddress = new MailAddress(DEFAULT_SENDER);
    MailMessage newmail = new MailMessage(fromAddress, toAddress);

    //check if we need to cc this to anyone
    if (!string.IsNullOrEmpty(cc))
    {
        MailAddress ccAddress = new MailAddress(cc, "Secondary Recipient");
        newmail.CC.Add(ccAddress);
    }

    newmail.IsBodyHtml = true;
    newmail.Subject = subject;
    newmail.Body = msg;
    System.Net.Mail.SmtpClient mail = new SmtpClient(DEFAULT_MAIL_SERVER);
    mail.Send(newmail);
}

By the way, Yaro posted this in this blog too :)