smtpclient

问题 I'm working on an order entry application targeted to windows mobile devices. I need to be able to send and receive emails from within the application, but without using pocket outlook (this is a customer requirement). I see that the .net mail classes are not available for the compact framework. So I need to look elsewhere. I found 2 interesting libraries: CSLMail and MooseWorks' Email Controls. But none is able to deal with SSL connections, and this is a mandatory requirement I've found a

问题 I have a method that is supposed to connect to an Smtp Server to see if it is online. This method works when testing many mail servers, but not all of them. The code is below, however the failure happens on... client.Connect(strMailServer, intPort); ... before the logic of talking to the server even begins. It simply won't connect. I've made absolutely sure I'm connecting the the right IP and port (25), and I've used third party web sites like mxtoolbox to test the same server IP with success

问题 I created a method to send email in VB.NET: Imports System.Threading Imports System.Net.Mail Imports System.ComponentModel Module Module1 Dim smtpList As New ArrayList Dim counter = 0 Private Sub smtpClient_SendCompleted(ByVal sender As Object, ByVal e As AsyncCompletedEventArgs) System.Diagnostics.Debug.WriteLine("completed!") System.Console.WriteLine("completed!") End Sub Public Function createSmtp() As SmtpClient Dim smtp = New SmtpClient() Dim user = "AKAKAKAKAKAKAKAK" Dim host = "smtp

问题 I'm trying to send mails via SmtpClient in .net core. Basically I'm just migrating some old .net framework code to .net core. In the old system it's done in the following way: using (var smtpClient = new SmtpClient("smtp.xyz.de", 587)) { smtpClient.UseDefaultCredentials = false; smtpClient.Credentials = new System.Net.NetworkCredential("user", "password", "domain"); smtpClient.EnableSsl = true; smtpClient.Send(mailMessage); } This code is working fine. Now I migrated this code to .net core

问题 I have used the System.Net.Mail.SMTPClient class in virtually every application I have developed. I have never had any issues with it. However, I am encountering an extremely annoying situation in which a call to SMTPClient.Send causes my production application to crash EVEN WITHIN A TRY/CATCH BLOCK, and THE EXE IS DELETED! WTF. In the development environment there is no problem whatsoever, email is sent without a hitch. The application is written in C# and created in Visual Studio 2010. I

问题 This is the settings: AddSettingIfNotExists(EmailSettingNames.DefaultFromAddress, "abc@xyz.tech"); AddSettingIfNotExists(EmailSettingNames.DefaultFromDisplayName, "abc.tech Emailservice"); AddSettingIfNotExists(EmailSettingNames.Smtp.UserName, "abc@xyz.tech"); AddSettingIfNotExists(EmailSettingNames.Smtp.Domain, "abc.tech"); AddSettingIfNotExists(EmailSettingNames.Smtp.EnableSsl,"false"); AddSettingIfNotExists(EmailSettingNames.Smtp.Host, "webmail.abc.tech"); AddSettingIfNotExists

问题 I have a following method which I call for every MailMessage: public static string SendEmail(MailMessage email) { string rez = ""; try { var smtpserver = "10.xxx.xx.xx"; using (SmtpClient mailclient = new SmtpClient()) { mailclient.Host = smtpserver; mailclient.Send(email); } rez = "OK"; } catch (Exception ex) { rez = "NOT OK: " + ex.Message; } return rez; } I send 32 email-s at once, and for two of them I got following error from mailclient.Send(): NOT OK: Service not available, closing

问题 I see there are many ways to send email in the background (without UI) in iOS devices and without using MFMailComposeViewController class. Most popular examples are fill an online form and press submit button. Here are the most popular methods i see in stackoverflow.. (1) Using your own SMTP client. This approach is working for me but in my private network but not working in my company premises as in company network I am not allowed to use gmail (public emails) and don't have SMTP details of

问题 I am not able to send emails to external domain addresses like 'user.one@asdf.com' using the code below. SmtpClient smtpClient = new SmtpClient(smtpMailServer); smtpClient.UseDefaultCredentials = true; smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network; smtpClient.EnableSsl = true; //Sending mail. smtpClient.Send(mailMessage); I get an exception - Mailbox unavailable. The server response was: 5.7.1 Unable to relay for xxx@example.com If I change the DeliveryMethod to - smtpClient

问题 I have code for sending email to clients. System.Net.Mail.SmtpClient Client = new System.Net.Mail.SmtpClient(); MailMessage Message = new MailMessage("From", "To", "Subject", "Body"); Client.Send(Message); With following in App.config. <system.net> <mailSettings> <smtp from="support@MyDomain1.com"> <network host="smtp.MyDomain1.com" port="111" userName="abc" password="helloPassword1" /> </smtp> </mailSettings> <mailSettings> <smtp from="support@MyDomain2.com"> <network host="smtp.MyDomain2