Problem with mail sending

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C#

ASP.NET

Hi all!!

i am trying to send error log email from my site but the following error pops up everytime..

Service not available, closing transmission channel. The server response was: Cannot connect to SMTP server 74.125.236.86 (74.125.236.86:587), connect error 10060

MailClient.Credentials = new NetworkCredential(MonalConfiguration.MailUsername, MonalConfiguration.MailPassword);

MailMessage mailmessage = new MailMessage(from, to, subject, body);

MailClient.Send(mailmessage);

Here are the settings in my web.cofig

<appSettings>
    <add key="MailServer" value="mail.google.com"/>
    <add key="MailUsername" value="UserName@gmail.com"/>
    <add key="MailPassword" value="Password"/>
    <add key="MailFrom" value="UserName@gmail.com"/>
    <add key="EnableErrorLogEmail" value="true"/>
    <add key="ErrorLogEmail" value="ujjwal.uniyal111@gmail.com"/>
  </appSettings>

this is my configuration file

public static  class MonalConfiguration
{
    private static string dbConnectionString;
    private static string dbProviderName;

    static  MonalConfiguration()
    {
        dbConnectionString = ConfigurationManager.ConnectionStrings["Constr"].ConnectionString;
        dbProviderName = ConfigurationManager.ConnectionStrings["Constr"].ProviderName;
    }

    public static string DbConnectionString
    {
        get { return dbConnectionString; }

    }
    public static string DbProviderName
    {
        get { return dbProviderName; }
    }

    public static string MailServer
    {
        get {  return ConfigurationManager.AppSettings["MailServer"];}
    }

    public static string MailUsername
    {
        get { return ConfigurationManager.AppSettings["MailUsername"] ;}
    }

    public static string MailFrom
    {
        get { return ConfigurationManager.AppSettings["MailFrom"] ;}
    }

    public static string MailPassword
    {
        get { return ConfigurationManager.AppSettings["MailPassword"];}
    }

    public static bool EnableErrorLogEmail
    {
        get { return bool.Parse (ConfigurationManager.AppSettings["EnableErrorLogEmail"]); }
    }
    public static string ErrorLogEmail
    {
        get { return ConfigurationManager.AppSettings["ErrorLogEmail"]; }
    }
}