smtpclient

问题 I'm trying to send a simple plain-text email through my VB.net web application. I've followed the instructions here: http://www.systemnetmail.com/faq/3.1.1.aspx But, regardless of what email addresses I use, I keep getting the message "unable to connect to the remote server". Here is my code 'Create the mail message Dim mail As New MailMessage() 'set the addresses mail.From = New MailAddress("<email1>") mail.To.Add("<email2>") 'set the content mail.Subject = "This is an email" mail.Body =

问题 I'm getting the error "Server does not support secure connections" with my code below. SmtpClient smtp = new SmtpClient(); MailMessage mail = new MailMessage(); mail.From = new MailAddress("*****@gmail.com"); mail.To.Add(recieverId); mail.Subject = "Invoice Copy and Delivery Confirmation for booksap.com Order " + orderno + ". Please Share Feedback."; System.Net.Mail.Attachment attachment; attachment = new System.Net.Mail.Attachment(Server.MapPath("OrderMail\\Invoice.pdf")); mail.Attachments

问题 I have written ASP.Net code to send mails from domain1.com mail account such as abc@domain1.com. This code work fine otherwise and the mails go. But when the same code executes on domain2.com, even with correct userid-pwd it gives the following error: System.Net.Mail.SmtpFailedRecipientException: Mailbox name not allowed. The server response was: sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) at System.Net.Mail.SmtpClient.Send(MailMessage message) Is there any way to fix

问题 This question already has answers here : Testing SMTP server is running via C# (5 answers) Closed 6 years ago . I had web application that users can set SMTP server information (server/host, SMTP Port, Username, Password, EmailAddress, usedSSL). i need when user set information validatre server without sending email and check Is smtp information valid or not? I found website that works perfect and check is SMTP server alive (but not authentication check).. http://mxtoolbox.com/diagnostic.aspx

问题 Protected Sub btnLocalSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnLocalSubmit.Click Dim logic = New connections logic.emailsToSend(User.Identity.Name, getURL, reportedBy) SendAsync() Response.Redirect(getRedirectionPath, False) Catch ex As Exception Response.Write(ex.Message) Finally _con.Close() _con.Dispose() _sqlComm.Dispose() End Try End Sub Sub SendAsync() Dim _con As New SqlConnection(ConfigurationManager.ConnectionStrings("CitizenJDBConnectionString")

问题 I have written an email client and have from time to time noticed that links in some received mails fail because of two dots in a URL where there should be one. By Investigating, I found that in all such cases the two dots are at the start of a line of quoted-printable HTML. On reading RFC 2821, I see this is probably happening because of dot-stuffing. My question basically is, who should do the dot-stuffing and who should remove it? If we take a simple sequence we have as follows: A ----> B

问题 I'm trying to send an email from my own domain without using an external SMTP server. I'm using NodeMailer's SMTP connection: let options = { secure: true, port: consts.portOut,//465 host: consts.host, //mydomain.com transactionLog: true, debug: true, requireTLS: true, authMethod: 'PLAIN', }; let connection = new SMTPConnection(options); connection.connect(function() { let auth = { user: 'abc', pass: 'def' }; connection.login(auth, function(err) { if (err) { console.log("Authentication failed

问题 While using SendMailAsync I am getting the following error: An asynchronous module or handler completed while an asynchronous operation was still pending My code : public static async Task SendEmail(MessageContent messageContent, string emailBody) { SmtpClient smtpClientNoSend = new SmtpClient(); await smtpClientNoSend.SendMailAsync(mailMessage); } Call From Controller: public async System.Threading.Tasks.Task<ActionResult> Register() { await SendEmail(); } private void SendEmail() {

问题 I am trying to use System.Net.Mail for an application to send an email, but get this exception: System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 198.238.39.170:25 The code I am using is: string mailserver = "Scanmail.ofm.wa.lcl"; MailMessage msg = new MailMessage("albert@einstein.net", "snark@snarky.com",

问题 I'm trying to develop an app that sends email, and our internal network is locked down pretty tight, so I can't relay using our internal mail servers. Has anyone ever used something like no-ip.com? Are there any other alternatives? 回答1: If you just need to check that the e-mails are being sent to the correct addresses and with the correct contents, the easiest way is to use a drop folder by editing the app or web.config file: <system.net> <mailSettings> <smtp deliveryMethod=