system.net.mail

问题 I am getting this message since Yahoo have made changes in user authentication. My code still works if I use option suggested by Yahoo, which is: While you switch apps or update your app , you can give the old app temporary access. Just remember, this is not intended for permanent access and you'll want to turn it off afterwards. Turn on Allow apps that use less secure sign in. Once the feature is turned on, you'll get regular alerts reminding you to turn it off... My question is how to

问题 Why does this code: MailMessage mm = new MailMessage(); Throw this exception: System.Security.Cryptography.CryptographicException was caught Message=The handle is invalid. Source=mscorlib StackTrace: at System.Security.SecureString.ProtectMemory() at System.Security.SecureString.InitializeSecureString(Char* value, Int32 length) at System.Security.SecureString..ctor(Char* value, Int32 length) at System.Net.UnsafeNclNativeMethods.SecureStringHelper.CreateSecureString(String plainString) at

问题 am using system.net.mail to send email as shown below, but its too slow. it takes about a minute to send, whats wrong with my code. Am calling the code below in backgroundworker_dowork. [edit]: is there a faster alternative, maybe free or open source code ' send the email ' Dim smtp As SmtpClient = New SmtpClient() Dim mail As New MailMessage() Dim i As Long = 0 ' SMTP settings ' With smtp .Host = Trim$(sSMTP) .Port = Trim$(iPort) .UseDefaultCredentials = False .Credentials = New System.Net

问题 I desperately need help solving this issue. How can I get my deployed app to send emails to any address via SMTP? I am developing a web-based sales-tracking application in Visual Studio 2015 (ASP.NET MVC). The site will be hosted on an Arvixe BusinessClass for Windows shared server. The domain of the server is mydomain.com, however this domain is actually hosted by one.com, which also provides mydomain.com email. One of the functions of the site is to inform the line manager when a user

问题 I have a simple C# app that send SMTP emails (using System.Net.Mail classes). After sending (emailing) a MailMessage object I want to iterate through the list of the attachments and delete the original files associated with those attachments... but I am having a hard time finding the full file path associated with each attachment - without keeping my own collection of attachment filepaths. There has got to be a good way to extract the full file path from the attachment object. I know this has

问题 Is there anyway to have all emails go to a different address when System.Web.HttpContext.Current.IsDebuggingEnabled is true? Or do I need a new class which I use to send email everywhere? 回答1: We use a similar solution to the MailProxy method detailed by tvanfosson. However we have a few differences that I feel are worth mentioning. The first is that we simply extend the SmtpClient class and override the Send methods when in a development or testing environment. We use a config file to

问题 Searching StackOverflow, I found this question on how to Retrieve SMTP settings from Web.Config, but no details on how to update the SMTP back to the web.config file. I started with the following code: Configuration webConfig = WebConfigurationManager.OpenWebConfiguration("~"); MailSettingsSectionGroup settings = (MailSettingsSectionGroup)webConfig.GetSectionGroup("system.net/mailSettings"); SmtpSection smtp = settings.Smtp; SmtpNetworkElement net = smtp.Network; but was quickly clued in by

问题 I have a problem creating application to send email. I already have one working as a Windows Forms Application and then decided to do the same from the empty project, because I need to make a background application now. I used the System.Net.Mail namespace for that in a Windows Forms. Then added the same code to the new project. However, I get the following error: The type or namespace name 'Mail' does not exist in the namespace 'System.Net'. The 'System.Net' reference is included in the

问题 I have trouble creating a simple mock mail sender within an ASP NET 5 project. Here the method : public static Task SendMail(string Email, string Subject, string Body) { SmtpClient client = new SmtpClient(); client.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory; client.PickupDirectoryLocation = "C:\\TMP"; MailAddress from = new MailAddress("jane@contoso.com", "Jane " + (char)0xD8 + " Clayton", System.Text.Encoding.UTF8); MailAddress to = new MailAddress(Email); MailMessage

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Not sure if anyone has used 1and1 MS Hosting and encountered problems with their trust levels? I am simply trying to send mail using system.net.mail in asp.net (which works fine) but when its online with 1and1 I get this error: Description: The application attempted to perform an operation not allowed by the