I am facing some unexpected problem in sending email which i have never faced before. I have hosted my application on the MyASP.NET server.
My Email Domain is purchased from VERIO.
I am sending mails using by my application, which is hosted on MYASP.NET server.
It means I am trying to connect VERIO SMTP server for sending mails from MYASP.NET server.
It is not giving me any error on sending mail click button from my application. but also email is not going to recipient.
The code which I am using are as follows:
MailMessage mail = new MailMessage();
mail.From = new MailAddress("museum#essenrfid.net");
mail.To.Add(txtTo.Text);
//set the content
mail.Subject = "Test Subject";
mail.Body = "TEst Contect";
//send the message
SmtpClient smtp = new SmtpClient("smtp.verio.com", 587);
smtp.EnableSsl = true;
//IMPORANT: Your smtp login email MUST be same as your FROM address.
NetworkCredential Credentials = new NetworkCredential("XXXXx", "XXXXX");
smtp.Credentials = Credentials;
smtp.Send(mail);
NOTE: My email was working till yesterday from last one month but I have not changed code & it was not working from yesterday. What could be the issue. Any Idea anyone faced this problem before.
Please help.
Thanks In advance.
Related
Trying to send email from asp.net application.
Emailing to server address: Smtp.office365.com
Port - 587
Connection Security - STARTTLS
I have SMTP user name and SMTP password.
Fails to send email.
The code uses the SmtpClient, as follows:
String userName = "name#example.com";
String password = "Password";
MailAddress RecipientEmail = new MailAddress(EmailTo);
MailAddress SenderEmail = new MailAddress(cEmailFrom);
MailMessage msg = new MailMessage(SenderEmail, RecipientEmail);
msg.Subject = "Test";
msg.Body = "This is a test";
msg.IsBodyHtml = true;
SmtpClient client = new SmtpClient("smtp.office365.com:587");
client.Credentials = new System.Net.NetworkCredential(userName, password);
client.EnableSsl = true;
client.Send(msg);
The error message: Failure sending email. No other information.
But if I specify the port:
client.port = 587
instead of adding it to the host name, I get a very long error:
Transaction failed. The server response was: 5.2.0
STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 16.55847:BC110000, 17.43559:0000000094000000000000000100000000000000, 20.52176:140FBF85130010100A00D231, 20.50032:140FBF85831710100A00E231, 0.35180:86260000, 255.23226:0A00C931, 255.27962:0A000000, 255.27962:0E000000, 255.31418:0A000000, 16.55847:DC000000, 17.43559:0000000088010000000000001E00000000000000, 20.52176:140FBF85130010109F260000, 20.50032:140FBF8583171010A4260000, 0.35180:0A00D330, 255.23226:A9260000, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:B3260000, 4.21921:DC040000, 255.27962:FA000000, 255.1494:0A007530, 0.37692:02010480, 0.44092:00000000, 0.40348:02010480, 0.34608:04000100, 0.55056:00000000, 0.42768:302E3134, 0.56112:31393A44, 0.52807:30363031, 4.33016:DC040000, 7.40748:010000000000010B2D343438, 7.57132:000000000000000037323032,
What is missing?
The important part from the error is the phrase "SendAsDenied".
Office 365 won't let you use your account on their smtp servers to send e-mail messages from someone else's address. You just can't do it. The closest you can get is in cases of organizational domain accounts, you can sometimes have service accounts within the organization that can be delegated to send on behalf of other users within the organization's domain.
If you need to do more than that, you must manage your own smtp server... and let me tell you, that's a whole other can of worms, requiring an ability to understand and configure some or all of rDNS, SPF, DKIM, Domain-Keys, and DMARC.
I am producing a website for a friends company and they would like customers to be able to contact them using a form on the website that will email the query to their work email address.
All the examples I have been able to find use GMail's SMTP server. I have managed to get this to work using the code below but e-mails always appear in the inbox as from the GMail account, regardless of what I set mm.From to be. I understand that this is the downside to using GMail's SMTP server.
Dim mm As MailMessage = New MailMessage()
mm.From = New MailAddress("customer#test.com")
mm.Subject = "Test Email"
mm.Body = "<p>This is a test email</p>"
mm.IsBodyHtml = True
mm.To.Add(New MailAddress("info#myCompany.com"))
Dim smtp As SmtpClient = New SmtpClient()
smtp.Host = "smtp.gmail.com"
smtp.EnableSsl = True
Dim NetworkCred As NetworkCredential = New System.Net.NetworkCredential()
NetworkCred.UserName = "mycompany#gmail.com"
NetworkCred.Password = "myPassword"
smtp.UseDefaultCredentials = True
smtp.Credentials = NetworkCred
smtp.Port = 587
Try
smtp.Send(mm)
Catch ex As Exception
Response.Write(ex)
End Try
I would like the senders e-mail address to appear in the from field so users can just click reply when a message comes in.
The business e-mail account they have is provided by GoDaddy and I have tried entering the SMTP and account details in the code but I get the following error:
System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to read data from the transport connection: net_io_connectionclosed.
Any help would be greatly appreciated.
Thanks
You can use any SMTP service that you have access to. So if GMail's doesn't do what you need, try another one. (The settings for that other one may be different, check with the service host for details.)
However, one thing you can definitely do in your code is set a ReplyTo address. From is only one header in the message, there are others that can be used. A ReplyTo header tells the email client that replies should be sent to a given email address.
mm.ReplyTo = New MailAddress("customer#test.com")
I am getting this error while sending email from my application. Can anyone suggest any solution.
Service not available, closing transmission channel. The server
response was: 4.3.2 Service not available, closing transmission
channel
Below is code.
string adminID = "AAA#tu.edu";
MailMessage msg = new MailMessage();
msg.From = new MailAddress(adminID);
msg.To.Add("BBB#ttu.edu");
msg.Subject = "Sample Email";
msg.Body = "Hello ";
SmtpClient SmtpMail = new SmtpClient();
SmtpMail.Host = "basic.smtp.ttu.edu";
SmtpMail.Port = 25;
SmtpMail.Send(msg);
Got the solution for the issue. The Server was rejecting the request because this application didn't have write rights on that server. The code was perfectly fine, just it was permissions problem. Hope this helps someone!
Please check whether the server which is sending the e-mail is whitelisted on the SMTP server or Exchange server.
I had the same issue and whitelisting it on SMTP server resolved my issue.
Not sure if this question has been asked elsewhere...
For a website project that I'm working on, I created an ASPX web form that will send an email containing the contents of the form on button click. I tried it and it worked when I'm using the Yahoo SMTP server and testing using my personal Yahoo email address (+ specifying the username and password).
However, it wouldn't work when I'm using the SMTP server for mail messages for the website (after I've created a new admin email account in the website).
The website is up and running and I'm able to send an email to the website's admin email account (through Yahoo) but just not when sending through the ASPX web form.
Here is the code for using the Yahoo SMTP server and it works fine:
SmtpServer.Credentials = New Net.NetworkCredential("username#yahoo.com", "password")
SmtpServer.Port = "25"
SmtpServer.Host = "smtp.mail.yahoo.com"
mail.From = New MailAddress("username#yahoo.com")
mail.To.Add("username#yahoo.com")
mail.Subject = "RE: Message Subject"
mail.Body = "Message goes here."
SmtpServer.Send(mail)
Now, here is the code for using my website's SMTP server which doesn't work:
SmtpServer.Port = "25"
SmtpServer.Host = "127.0.0.1"
mail.From = New MailAddress("admin#awesomewebsite.org.au")
mail.To.Add("admin#awesomewebsite.org.au")
mail.Subject = "RE: Message Subject"
mail.Body = "Message goes here."
SmtpServer.Send(mail)
These are the correct port and host numbers given by the web hosting company that hosts the website. They also said that username and password are not needed. I also tried appending this to the beginning of the code but it still wouldn't work:
SmtpServer.Credentials = New Net.NetworkCredential()
or even
SmtpServer.Credentials = New Net.NetworkCredential("", "")
I really don't know what to do. Please help this newbie out. Any response is appreciated.
By the way, the error message that I get when I test this out appears in a message box: "Failure sending mail."
You need to create an email account in your web site and use those credentials to send the mail just as you did with yahoo (This can be done in your admin portal of the website but some hosting providers will charge you separately for the email service). Further more the correct smtp server is also should be given, that depends on your hosting provider. You can get that information from your hosting provider. 127.0.0.1 will not work here anyway.
Don't import 'System.Net.Mail'.
Completed code is shown below:
Dim SmtpServer As New Net.Mail.SmtpClient
Dim mail As New Net.Mail.MailMessage
SmtpServer.Host = "198.154.99.8"
SmtpServer.UseDefaultCredentials = False
SmtpServer.Credentials = New System.Net.NetworkCredential("admin#awesomewebsite.org.au", "password")
mail.From = New Net.Mail.MailAddress("admin#awesomewebsite.org.au")
mail.To.Add("admin#awesomewebsite.org.au")
mail.Subject = "RE: Message Subject"
mail.Body = "Message goes here."
SmtpServer.Send(mail)
This is intranet application and I am using company's mail realy to send emails. It works fine in other applications I have but not in this one and everything is the same.
I get "System.Net.Mail.SmtpException: Syntax error in parameters or arguments. The server response was: 5.5.2 MAIL FROM syntax error" when attempting to send mail.
This is how I set it up:
MailMessage mm = new MailMessage();
mm.From = new MailAddress("NoReply#AMS_Redirection.company.org");
mm.To.Add(new MailAddress("my_emailaddress#company.org"));
mm.Subject = "AMS Redirection Error";
mm.Priority = MailPriority.Normal;
mm.IsBodyHtml = true;
mm.Body = "some html stuff here";
SmtpClient sc = new SmtpClient("mailrelay.company.org");
sc.Credentials = new NetworkCredential();
try
{
sc.Send(mm);
}
catch (SmtpException smtpEx)
{
//A problem occurred when sending the email message
string sScript = string.Format("alert(\"There was a problem in sending the email: {0}\");", smtpEx.Message.Replace("\r\n", " "));
ClientScript.RegisterStartupScript(this.GetType(), "SMTP Error", sScript, true);
}
I can successfully ping the mail relay.
Try setting the 'from' address to something you KNOW is wrong. I get this exception when the 'from' address is rejected by my SMTP forwarding service. If it still fails the same way you know the problem is in the config of the relay.
did you check if the smtp port of your SMTP server is the standard port? Otherwise you have to explicitly set it.