Please solve it my querry send email

Question

Hi guys,

 

I am using this code in local then it is working but when I am running the same code on

online then it is giving error so please let me know what can I do for it

 

i have giving my querry below

protected void submit_Click(object sender, EventArgs e)
{
Sendmail("[email protected]", "[email protected]", "Contact Enquiry by New Customer", "[email protected]", "1234", name.Value , number.Value ,
email.Value , message.Value);
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Thank You! We will contact you shortly…');location.href ='contactus.aspx';", true);
//Response.Redirect("contactus.aspx");
}
public static void Sendmail(string frm, string to, string subj, string logid, string passwd, string name1,string number1,string email1,string msg1)
{
try
{
MailMessage Msg = new MailMessage();
Msg.From = new MailAddress(frm);
Msg.Subject = "New Customer Enquiry |" + email1 + "";
//string Body += "Dear Sir, <br/>";
Msg.Body += "<table width='600px' bgcolor='#f6f8f1' border='1' cellpadding='1' cellspacing='1'>";
Msg.Body += "<tr>";
Msg.Body += "<td align='center'><img src='http://ritzeggcafe.com/images/logo2.png' class='img-responsive' alt=''/></td>";
Msg.Body += "</tr>";
Msg.Body += "<tr>";
Msg.Body += "<td style='padding-left:15px;'>";
// Msg.Body = "<h1>Hello Brahmabull </h1><h3>from  " + senderName2.Value + " </b><br/></h3>";
Msg.Body += "<h3>Dear <b> Sir </b>,</h3>";
Msg.Body += "<h4>Contact details are as mentioned below :</h4>";
Msg.Body += "<h3>Email Id: </h3><p>" + email1+ "</p>";
Msg.Body += "<h3>Contact No.</p>: </h3><p>" + number1 + "</p>";
Msg.Body += "<h3>Customer Name: </h3><p>" + name1+ "</p>";
// Msg.Body += " <br/>";
Msg.Body += "<h3><b>Messege: </b></h3><p>" + msg1 + "<br/></p>";
Msg.Body += " <br/>";
Msg.Body += "Regards By";
Msg.Body += " <br/>";
Msg.Body += "<h3><b>" + name1 + "</b></h3>";
Msg.Body += "</td>";
Msg.Body += "</tr>";
Msg.Body += "<tr>";
Msg.Body += "<td align='center'><h5>Copyright 2017 .</h5></td>";
Msg.Body += "</tr>";
Msg.Body += "</table><br/>";
Msg.IsBodyHtml = true;
MailAddress objfrom = new MailAddress(frm);
MailAddress objto = new MailAddress(to);
Msg.Subject = subj;
Msg.From = objfrom;
Msg.To.Add(objto);
//Msg.Body = body.ToString();
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 25;
smtp.Credentials = new System.Net.NetworkCredential("[email protected]", "1234");
smtp.EnableSsl = true;
smtp.Send(Msg);
Msg = null;
}
catch (SmtpFailedRecipientException ex)
{
//message(ex.Message);
}
}
}