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Smtpclient Error Sending Email

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This is to prevent people from using your server to send spam. As an example, the default IP range configuration does not allow external users to send messages to other external users. What is the relation between Aliasing and Flickering? Size: x KB, Max size: y KB In hMailServer it's possible to specify a maximum message size in the SMTP settings and in the domain settings.

Do you need your password? Nov 24, 2009 07:39 PM|ssinga2|LINK Hi I am trying send an email on buttonclick event in my aspx page and I am getting an exception"Error sending email, General Failure". share|improve this answer edited Oct 4 '13 at 12:04 Community♦ 11 answered Oct 3 '13 at 11:24 AndrewP 385 Also checking the log files could determine if you're having Also don't create a new SmtpClient everytime. http://stackoverflow.com/questions/18988348/error-in-sending-email-via-a-smtp-client

The Remote Name Could Not Be Resolved 'smtp.gmail.com' C#

The message is being sent to an alias which does not point at a valid account 550 Not authorized. This results in your connector not identifying and relaying your messages to external recipients. Sending email from devices and applications is less easy to fix, and you might not get clear information to help you.

  1. it keep 20% cpu even there are no emails to send.
  2. This error message is issued if grey listing is enabled, the sender is empty, and the recipient and IP address (and empty sender)triplet does not match an existing greylisting triplet.
  3. and i have check all those error out email has valid email address.
  4. If you can't reverse this, use SMTP client submission instead.
  5. Please re-authenticate.
  6. How to do this depends on what programming language you are working with.
  7. Posted 25-Aug-11 20:39pm suryaswathi674 Updated 25-Aug-11 20:45pm Prerak Patel141.8K v2 Add a Solution Comments Prerak Patel 26-Aug-11 2:45am Use code block for code segments. 4 solutions Top Rated Most
  8. Before hMailServer connects to the recipients email server, hMailServer checks that the IP it is going to connect to is not a local IP address.
  9. On Windows, the default line separator is CRLF.

Also select to modify the message subject. What is the difference between a function and a distribution? Browse other questions tagged c# .net smtpclient or ask your own question. The Remote Name Could Not Be Resolved Smtp Google Com Did I participate in the recent DDoS attacks on Dyn's DNS service?

Try logging into OWA with the printer's user name and password. Failure Sending Mail C# For connections coming from other hosts, SMTP authentication is required for deliveries to external recipients. e.g.: SmtpClient smtpClient = new System.Net.Mail.SmtpClient(); smtpClient.Host = "localhost"; smtpClient.Port = "25"; or SmtpClient smtpClient = new System.Net.Mail.SmtpClient("localhost", 25); Hope this may help. http://stackoverflow.com/questions/2209617/smtpclient-failure-sending-mail If you want it please Edit your question and specfity other assemblies are acceptable. –S Nash Sep 24 '13 at 18:39 | show 4 more comments 2 Answers 2 active oldest

Edit: This is my exception Trace Error - Failure sending mail.; Inner Ex - System.IO.IOException: Unable to read data from the transport connection: net_io_connectionclosed. Failure Sending Mail. At System.net.mail.smtpclient.send(mailmessage Message) smtp.send giving an error message "Error sending email, General Failure". For help, see Removing a user, domain, or IP address from a block list after sending spam email. This error message is issued if a client tries to authenticate using a method which is not supported by hMailServer. 504 Authentication type not specified.

Failure Sending Mail C#

Emails are no longer being sent to external recipients Network or ISP changes might change your static IP address. The problem will occur if the data directory specified in hMailServer.ini is not writeable by the hMailServer service. 554 Rejected - When a hMailServer script rejects a message The Remote Name Could Not Be Resolved 'smtp.gmail.com' C# SmtpClient smtpClient = new System.Net.Mail.SmtpClient();//Use a Try/Catch block to trap sending errors //Especially useful when looping through multiple sends try { smtpClient.Send(mailMessage); } { catch (System.Net.Mail.SmtpException smtpExc)//Log Smtpclient Failure Sending Mail there is server connection problem.

When I look at the headers in the message that was kicked back from AOL it has one less line than the successful messages hotmail gets: AOL Bad Message: Received: from How could a language that uses a single word extremely often sustain itself? MailPriority.High;//Text/HTML mailMessage.IsBodyHtml = false;//Set the subjet and body text //mailMessage.Subject = txtSubject.Text.Trim(); mailMessage.Body = txtBody.Text.Trim(); //Add one to many attachments //mailMessage.Attachments.Add(New System.Net.Mail.Attachment("c:\temp.txt") //Create an instance of share|improve this answer answered May 25 '12 at 12:27 Marc Roussel 111 add a comment| up vote 1 down vote Seeing your loop for sending emails and the error which you C# Smtpclient

Am I using the smtp server as a relay? i really need help in this. Please help!! [Answered]RSS 4 replies Last post Nov 30, 2009 08:21 PM by svmr ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads If you have disabled Allow empty sender address, the sender verification will fail, since the recipients SMTP server tries to verify by using an empty sender address.

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This option is disabled by default. C# Send Email With Attachment If an email message is rejected due to the MXcheck, this error message is issued. 550 The address is not valid. About us current community blog chat Server Fault Meta Server Fault your communities Sign up or log in to customize your list.

By default, hMailServer does not require SMTP authentication for connections coming from localhost / 127.0.0.1.

Remarks: All of samples in this section are based on first section: Send email in a simple C# project. The Last Monday more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Your device must support TLS version 1.0 or above. Ping Request Could Not Find Host Smtp Gmail Com The recipients SMTP server connects to the host specified in the MX record - which is likely where your hMailServer server is running if the MX records are set up properly.

When a SMTPclient is delivering an email to a SMTPserver, it must specify both the sender and recipient before trying to submit the actual message content.If a client fails to tell Did Salesforce recently update their aura library? more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation MailAddress mail = null; SmtpClient client = new SmtpClient(); client.Port = 25; client.EnableSsl = false; client.DeliveryMethod = SmtpDeliveryMethod.Network; client.UseDefaultCredentials = true; client.Host = smtpAddress; // Enter your company's email server here!

After failing with many solutions of usingSystem.Net.Mail, I used another assembly and that fixed the issue for me. A network or ISP change could change your static IP address. If you are able to do so, run a packet sniffer such as WireShark to check the packet flow. A common reason for issues with Office 365 SMTP relay is a blocked IP address.

Dev centers Windows Office Visual Studio Microsoft Azure More... This error typically indicates a client defect or a hacking attempt. 501 EHLO Invalid domain address. I'm hurt C++ Get min / max value of a static array at compile time Which kind of "ball" was Anna expecting for the ballroom? If the account [email protected] does not exist, the sender verification will fail.

There are a few things which can go wrong in these steps: If the MX records for the domain example.com is not set up properly, the recipients SMTP server may correct If the client does not do this, hMailServer responds with this error message. 502 VRFY disallowed If a SMTPclient tries to use the command VRFY, hMailServer responds with this error code. This occurs after the SMTP'data' tranmission. Send an email to make sure that the mailbox is active and has not been blocked for sending spam.

Flood prevention on your SMTP service could be stopping the e-mails from going out. i found this forums.asp.net/t/924682.aspx , in the last post of this forum somebody says to use lient.ServicePoint.MaxIdleTime = 1; does that make sense? –Nnp Feb 5 '10 at 20:06 | show When sending e-mail using Send to multiple recipients and the SMTP server accepts some recipients as valid and rejects others, Send sends e-mail to the accepted recipients and then a SmtpFailedRecipientsException