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 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.
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.
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 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.Search documentation
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.
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