smtpclient

问题 Is it possible to set "To" address in SMTP mail settings just like "From" address? there is an attribute for "From", but not "To" address. basically I need to send an email to technical support whenever a specific exception (or any unhandled exception) happens in the application. I can add it to "appSettings", but wondering if I can specify it in SMTP settings itself, without having to read from "appSettings". thanks in advance <system.net> <mailSettings> <smtp deliveryMethod="network" from=

问题 My WinForms C# program sends email. I've used MailMessage and SmtpClient . In the constructor of SmtpClient I passed smtp.gmail.com and port 587. This is working on my friend's computer, however when I try it I get this error: System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: The remote name could not be resolved: 'smtp.gmail.com' System.Net.Mail.SmtpException: Operation Timed out How do I fix this error? Why is it specific to my computer? If i use port 25 i

问题 I having problem on sending message on the server. But in my local I can send message to the emails using the free smtp server. Maybe there's a firewall or localhost is not accepted in the email policy? Please advise.. thanks! Code: //send email MailMessage objEmail = new MailMessage(new MailAddress(ConfigurationManager.AppSettings["emailAdd"].ToString()), new MailAddress(ConfigurationManager.AppSettings["emailAdd"].ToString())); objEmail.Subject = "Test"; objEmail.Body = _Message; objEmail

问题 I am using SmtpClient to send mail. How can I dispose SmtpClient . I am using .NET 3.5. try { smtpClient.Send(message); Log.WriteSpecialLog("smtpClient mail sending try success", ""); } catch (Exception ee) { Log.WriteSpecialLog("smtpClient mail sending try Failed : " + ee.ToString(), ""); return false; } 回答1: For .NET 3.5, not being able to proper dispose the SmtpClient is a know issue. http://connect.microsoft.com/VisualStudio/feedback/details/146711/smtp-never-sends-the-quit-command Your

问题 The MSDN docs for SmptClient say that instance members are not guaranteed to be thread-safe (born out by the use of instance properties to store things like the MailWriter in the reference source). On the other hand, this post (and my experience) suggests that simply creating and disposing an SmtpClient for each email sent can cause you to hit the connection limit pretty easily. What's the best way to manage these objects? Do I have to manually create a pool or throttle usage with a semaphore

问题 In Windows Console Application with .NET 3.5 ( I changed the existing .NET 2.0 application to .NET 3.5 ) I have strange problem, the code for sending email works few times(may be 5 to 10 times). After few times, it fails to send the email with message "Failure sending mail". The same code works after restarting the system. ( which is not the expected solution in production). Here is the piece of code, I felt , somewhere I have close this SmtpClient Connection. so I set the client to null and

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'm getting the above error. I've looked at online solutions and I seem to have done all that is necessary but I'm still getting it. I've included Enablessl = true; Delivery method is Network and I've supplied the credentials. I debugged it and the username and password seem to be correct. using System; using System.Net; using System.Net.Mail; using System.Windows.Forms; namespace SendMail { public partial class MainWindow : Form { #region Private variables private MailMessage _message = new

问题 I'm trying to send automated emails from a C# console application from machines to clients all on the same domain via our internal Exchange 2007 server (using SMTP), but I'm hitting a snag with distribution lists that only allow authenticated senders. Basically the mails I'm sending are getting rejected by Exchange with: #550 5.7.1 RESOLVER.RST.AuthRequired; authentication required ##rfc822;AuthTESTGroup@example.com I'm using System.Net.Mail.SmtpClient and setting the Credentials property to

问题 I am using SMTPclient to send mail with attachment. When the attachment is more than 2mb, I am getting the below error: ** "Exceeded storage allocation. The server response was: 4.3.1 Message size exceeds fixed maximum message size". ** 1) Can i send email ** using smtpclient with attachment size >2mb. ** If yes, What is the limit of attachment. 2) How can i fix the above error? Please give me an idea,if you have the solution. 回答1: Modern SMTP mail servers have a configuration variable to set