Issue sending mail message from ASP.NET MVC applic

问题:

I have a form on a MVC Web Application that is hosted over at GoDaddy that users can fill out and send to our office. I am currently testing it using both a Gmail account and a GoDaddy email account (linked to my hosting space). With the Gmail code in place, the email will send fine from my localhost, but when I publish it to the web I get the following error:

Request for the permission of type 'System.Net.Mail.SmtpPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Here is the code (borrowed from this post) I am using, credentials have been changed and password removed:

var fromAddress = new MailAddress("[e-mail]", "FEA Drone");
var toAddress = new MailAddress("[e-mail]", "ImproveIt Home Services");
const string fromPassword = "<removed>";
var subject = string.Format("Energy Evaluation Request for {0} {1}", model.FirstName, model.LastName);
var body = MailBody(results);

var smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
using (var message = new MailMessage(fromAddress, toAddress)
{
    Subject = subject,
    Body = body
})
{
    smtp.Send(message);
}    

I then tried to use my GoDaddy email that I set up for this particular form, and again locally it sends. However, when this one is uploaded it just times out rather than give me any sort of useful information. Here is that code:

var fromAddress = new MailAddress("[e-mail]", "FEA Drone");
var toAddress = new MailAddress("[e-mail]", "ImproveIt! Home Services");
const string fromPassword = "<removed>";
var client = new SmtpClient
{
    Host = "relay-hosting.secureserver.net",
    Port = 25,
    EnableSsl = false,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Timeout = 20000,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};

using (var msg = new MailMessage(fromAddress, toAddress)
{
    Subject = string.Format("Energy Evaluation Request for {0} {1}", model.FirstName, model.LastName),
    IsBodyHtml = false,
    Body = MailBody(results)
})
{
    client.Send(msg);
}

Originally I had smtpout.secureserver.net for my GoDaddy Host, but I found out from this article that I needed to change it to relay-hosting.secureserver.net. With the updated host information, the script runs but the mail message does not make it to the destination email inbox (or spam box).

Edit

Using Maxim's code, it seems I have gotten a "functioning" version in place. The email does not immediately appear in the destination inbox, but does so after about 15 minutes. Too bad it seems that GoDaddy is a giant PITA when it comes to programmatic emailing.

Here is what I got:

var emailmessage = new System.Web.Mail.MailMessage()
{
    Subject = subject,
    Body = body,
    From = fromAddress.Address,
    To = toAddress.Address,
    BodyFormat = MailFormat.Text,
    Priority = System.Web.Mail.MailPriority.High
};

SmtpMail.SmtpServer = "relay-hosting.secureserver.net";
SmtpMail.Send(emailmessage);

Thanks again for the assistance, I hope that I can figure out how to get GoDaddy to cooperate better. If I can, I will post back with updates.

回答1:

I have some ASP.NET MVC applications hosted on GoDaddy, too, that send out email. Unfortunately, the GoDaddy email policy is somewhat bad:

First of all, you must use relay-hosting.secureserver.net - you cannot use external SMTP servers, like Gmail.

Secondly, relay-hosting is usually very very slow. In my experience, some emails take around 90 minutes to be sent out, while others simply aren't delivered at all.

I've emailed back and forth with GoDaddy support many times about this issue but they have yet to fix the huge wait times/problems or allow external SMTP servers.

---

As for why your messages aren't delivering, you should try running the script multiple times to make sure that no anomalies are occuring. If it still doesn't work, here's my mail code:

var emailmessage = new System.Web.Mail.MailMessage()
                                   {
                                       Subject = "Subject",
                                       Body = "Body",
                                       From = "[e-mail]",
                                       To = "[e-mail]",
                                       BodyFormat = MailFormat.Text,
                                       Priority = MailPriority.High
                                   };

SmtpMail.SmtpServer = "relay-hosting.secureserver.net";
SmtpMail.Send(emailmessage);

The only thing that is different (as far as I have noticed) is that you are trying to supply credentials to the SMTP server. Actually, relay-hosting.secureserver.net does not require any credentials whatsoever, but it will only send email if it detects that the message is being sent from a GoDaddy server. This might fix your problem!

回答2:

I received this error: "Mailbox name not allowed. The server response was: sorry, relaying denied from your location". I was using this to connect:

SmtpClient smtpClient = new SmtpClient();
smtpClient.Host = "relay-hosting.secureserver.net";
smtpClient.Port = 25;
smtpClient.Timeout = 10000;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = new NetworkCredential("emailAddress", "password");
String bodyText = "Hello World";
MailMessage mailMessage = new MailMessage("fromEmail", "toEmail", "Subject", bodyText);
mailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
smtpClient.Send(mailMessage);

Upon reviewing this answer: https://stackoverflow.com/a/4594338/1026459 I came to realize that the Host should be different if using credientials. I changed my code to this:

SmtpClient smtpClient = new SmtpClient();
smtpClient.Host = "smptout.secureserver.net";
//same code as above

And not only did the emails send properly, but they arrived in seconds.

回答3:

Don't recall where I found this code, but it works for me on my GoDaddy server for sending email via a google account:

public class GmailService : IEmailService
{
    private static int _port = 465;
    private readonly string _accountName;
    private readonly string _password;

    public GmailService(string accountName, string password)
    {
        _accountName = accountName;
        _password = password;
    }
    public void Send(string from, string to, string subject, string body, bool isHtml)
    {
        Send(from, to, subject, body, isHtml, null);
    }

    public void Send(string from, string to, string subject, string body, bool isHtml, string[] attachments)
    {
        System.Web.Mail.MailMessage mailMessage = new System.Web.Mail.MailMessage
                                                      {
                                                          From = from,
                                                          To = to,
                                                          Subject = subject,
                                                          Body = body,
                                                          BodyFormat = isHtml ? MailFormat.Html : MailFormat.Text
                                                      };


        // Add attachments
        if (attachments != null)
        {
            for (int i = 0; i < attachments.Length; i++)
            {
                mailMessage.Attachments.Add(new Attachment(attachments[i]));
            }
        }

        //  Authenticate
        mailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1);
        // Username for gmail - [e-mail] for email for Google Apps
        mailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", _accountName);
        // Password for gmail account
        mailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", _password);
        // Google says to use 465 or 587.  I don't get an answer on 587 and 465 works - YMMV
        mailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", _port.ToString());
        // STARTTLS 
        mailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", true);

        // assign outgoing gmail server
        SmtpMail.SmtpServer = "smtp.gmail.com";
        SmtpMail.Send(mailMessage);
    }
}

Update: Here is how I am using this code:

GmailService gmail = new GmailService("[e-mail]", "the_password");
const string from = "Email Service <[e-mail]>";
const string to = "my_email_address";
const string subject = "Contact Form";
string body = "your message";
gmail.Send(from, to, subject, body, false);

This may make a difference...I have a Google Apps account (free). Therefore, I am able to have the from address the same domain as my server.

回答4:

It works fine, follow my steps

1. First check your Email plan from Godaddy Webmail

   a. Log in to your Account Manager.

   b. Click Workspace Email.

   c. Next to the account you want to use, click Manage.

   d. For the account with the email address you want to use, click (Show addresses).

   e. Click the email address you want to use, and then go to the Advanced tab.it shows the Email Plan.

   [1]: http://i.stack.imgur.com/AJAoB.png

   Based on Email Plan, You choose the Host Name. Example: If Email Plan AP(2) means smtp.Host="smtpout.asia.secureserver.net"or if Email plan EU(2)means smtp.Host="smtpout.europe.secureserver.net" or if Email Plan US means smtp.Host="smtpout.secureserver.net".

2. Confirm your site is with SSL or without SSL. Because you choose the portNo based on SSLs Example : if Without SSL means smtp.EnableSsl = false Out going PortNo is 25, 80, 3535. In case If With SSL means mtp.EnableSsl = true Out going PortNo is 465.

   These are all the main points to stay in mind to work in Godaddy mail configuration.

   Below mention the code,

   using (MailMessage mail = new MailMessage(from, mailmodel.To))
                       {
   
                           mail.Subject = mailmodel.Subject;
                           mail.IsBodyHtml = true;
                           mail.Body = mailmodel.Body;
                           mail.Priority = MailPriority.High;
                           SmtpClient smtp = new SmtpClient();
                           smtp.Host = host;
                           smtp.EnableSsl = false;
                           smtp.UseDefaultCredentials = false;
                           NetworkCredential networkCredential = new NetworkCredential(from, Password);
                           smtp.Credentials = networkCredential;
                           smtp.Port = portNo;
                           smtp.Timeout = 100000;                                smtp.Send(mail);}