什么时候MAILMESSAGE空构造工作？ [英] When does the empty MailMessage constructor work?

问题描述

我们有一个Asp.Net的解决方案，一直在生产中使用System.Net.Mail.MailMessage与空的构造超过2年：

We have an Asp.Net solution that's been in production for over 2 years using System.Net.Mail.MailMessage with the empty constructor:

using (MailMessage _mailMessage = new MailMessage()) // Exception thrown here
{
  _mailMessage.From = new MailAddress(sFrom); // Setting additional properties - never gets here
  _mailMessage.Body = sBody;
  _mailMessage.Subject = sSubject;
  _mailMessage.IsBodyHtml = true;

昨天我们有一个活的网站报告异常：指定的字符串不是一个电子邮件地址，所需表格。我们通过添加所需的节点到web.config文件固定它。

Yesterday we had a live site report the exception: The specified string is not in the required form for an email address. We fixed it by adding the required node to the web.config file.

现在的问题是：为什么这个曾经工作？或者莫非曾经工作过？

The question is: Why did this ever work? or Could it have ever worked?

错误：
指定的字符串不是一个电子邮件地址所要求的形式。
   在System.Net.Mail.MailAddressParser.ReadCfwsAndThrowIfIncomplete（字符串数据的Int32指数）
   在System.Net.Mail.MailAddressParser.ParseDomain（字符串数据的Int32＆安培;指数）
   在System.Net.Mail.MailAddressParser.ParseAddress（字符串数据，布尔expectMultipleAddresses，的Int32＆安培;指数）
   在System.Net.Mail.MailAddressParser.ParseAddress（字符串数据）
   在System.Net.Mail.MailAddress..ctor（字符串的地址，字符串显示名，编码displayNameEncoding）
   在System.Net.Mail.MailMessage..ctor（）

Error: The specified string is not in the form required for an e-mail address. at System.Net.Mail.MailAddressParser.ReadCfwsAndThrowIfIncomplete(String data, Int32 index) at System.Net.Mail.MailAddressParser.ParseDomain(String data, Int32& index) at System.Net.Mail.MailAddressParser.ParseAddress(String data, Boolean expectMultipleAddresses, Int32& index) at System.Net.Mail.MailAddressParser.ParseAddress(String data) at System.Net.Mail.MailAddress..ctor(String address, String displayName, Encoding displayNameEncoding) at System.Net.Mail.MailMessage..ctor()

感谢

EDITS

• 我们从.NET 3.5升级到4.0上个月！


• 添加堆栈跟踪


• 7个月后，该错误只发生在某些服务器上。为什么呢？

推荐答案

一个有点晚了答案。但我有同样的问题。你需要，如果你使用的是来自Web.Config中的SMTP设置，从在你的web.config设置。勾选此 MSDN链接了解更多详情

A little bit late for the Answers. But I had the same problem. You need to set the from in your Web.Config if you are using smtp setting from Web.Config. Check this MSDN Link for more details

<mailSettings>
      <smtp from="[e-mail]">// This is important when constructing new mail message. Make sure from is an email address.
        <network host="smtp.gmail.com" password="yourpassword" userName="[e-mail]" port="587" />
      </smtp>
</mailSettings>

如果您不使用 SMTPCLIENT 从Web.Config中则完全删除从web.config中的从属性，构建自己的smtpclient在code这样的

If you are not using SMTPCLIENT from Web.Config then completely remove the from attribute from Web.Config and construct your own smtpclient in code like this

var fromAddress = new MailAddress("[e-mail]", "Mr XXXXX");
            string fromPassword = "yourpassword";
            message.From = fromAddress;
            SmtpClient client = new SmtpClient()
            {
                Host = "smtp.gmail.com",
                Port = 587,
                EnableSsl = false,
                DeliveryMethod = SmtpDeliveryMethod.Network,
                Credentials = new NetworkCredential(fromAddress.Address, fromPassword),
                Timeout = 20000
            };

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