I am trying to send mail through mail server ( available in fatcow).
Username: info#efernssolutions.com
SMTP Server: smtp.hostname.com
SMTP Port: 587
I used the follwing code to send mail ,
if (ModelState.IsValid)
{
MailMessage message = new MailMessage();
try
{
message.To.Add(new MailAddress("kishore.eferns#gmail.com"));
message.From = new MailAddress("info#efernssolutions.com");
message.Subject = "Test mail";
message.Body = "this is the mail sended through my c#.net program";
message.BodyEncoding = System.Text.Encoding.UTF8;
message.SubjectEncoding = System.Text.Encoding.UTF8;
SmtpClient client = new SmtpClient();
client.Port = 587;
client.Host = "smtp.hostname.com";
System.Net.NetworkCredential nc = new System.Net.NetworkCredential("info#efernssolutions.com", "password");// is u are using Gmail
client.EnableSsl = true;
client.UseDefaultCredentials = false;
client.Credentials = nc;
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(ValidateServerCertificate);
client.Send(message);
}
catch (Exception ex)
{
;
}
}
When i use gmail server the code works fine and i received mail.
But it is not working with my email server.
I get the error,
the remote certificate is invalid according to the validation procedure
Is there anything left to do to make it work?
Please help,
Thank you
As first check I will suggest to check if your SSL certificate is correctly installed on your server
Related
Anyone can help please.
I am using the following code for sending email from my ASP.Net, C# web forms application which generating the error. The same code is working for other application. My domain name contains a hyphen in it (-). Is that the reason? Do I need to see email configuration or server/domain level settings? Please help.
string smtpServer = "smtp.office365.com";
int port = 587;
using (MailMessage mail = new MailMessage())
{
using (SmtpClient SmtpServer = new SmtpClient(smtpServer))
{
mail.From = new MailAddress(_emailIDFrom);
mail.To.Add(_emailIDTo);
mail.Subject = _subject;
mail.IsBodyHtml = true;
mail.Body = _emailBody;
SmtpServer.Port = port;
SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network;
SmtpServer.UseDefaultCredentials = false;
SmtpServer.Credentials = new System.Net.NetworkCredential(_emailIDFrom, _emailIDFromPassword);
SmtpServer.EnableSsl = true;
try
{
SmtpServer.Send(mail);
return true;
}
catch (Exception ex)
{
lblMessage.Text = ex.Message;
return false;
}
}
}
My Tls code in Global.asax Application_Start as follows
if (ServicePointManager.SecurityProtocol.HasFlag(SecurityProtocolType.Tls12) == false)
{
ServicePointManager.SecurityProtocol = ServicePointManager.SecurityProtocol | SecurityProtocolType.Tls12;
}
ERROR--
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [DXXP273CA0023.AREP273.PROD.OUTLOOK.COM]
I'm trying to set up a email notification for a asp.net project, but it doesn't seem to work. On localhost it gives me the following error
5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM
while on azure it triggers a suspicious login message over and over.
I tried multiple suggestions:
port 25 instead of 587
UseDefaultCredentials true or false
enable and disable SSL
nothing seems to work. The suspecious activity mail is the closest I got so far. Here is my code
var client = new SmtpClient();
client.Host = "smtp.office365.com";
client.UseDefaultCredentials = false;
client.Port = 587;
client.EnableSsl = true;
client.Credentials = new NetworkCredential("Rachelle.XXXX#outlook.com", "password");
client.DeliveryMethod = SmtpDeliveryMethod.Network;
var message = new MailMessage("Rachelle.XXXX#outlook.com", "Rachelle_xxxxx#hotmail.com");
message.Subject = "a ticket has been changed";
message.Body = "Hi there, a ticket has been changed on Cronos. Please check Cronos for more details";
message.BodyEncoding = Encoding.UTF8;
message.IsBodyHtml = true;
try
{
client.Send(message);
return message;
}
I am trying to hit gmail smtp server from my C# web application, But getting following errors :
1) Failure Sending Message
2) "The operation has timed out."
Following is my code,
MailMessage message = new MailMessage();
SmtpClient smtpClient = new SmtpClient();
string msg = string.Empty;
try
{
MailAddress fromAddress = new MailAddress(from);
message.From = fromAddress;
message.To.Add(to);
message.Subject = Name;
message.IsBodyHtml = true;
message.Body = "Some Message";
smtpClient.Host = "smtp.gmail.com"; // We use gmail as our smtp client
smtpClient.Port = 465; //587 for TLS 465 or 25 SSL
smtpClient.EnableSsl = true;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = new System.Net.NetworkCredential(from, fromPassword);
smtpClient.Timeout = 50000;
smtpClient.Send(message);
}
catch (Exception ex)
{
if (ex.InnerException != null)
{
Console.WriteLine("InnerException is: {0}", ex.InnerException);
}
}
Please Suggest i have tried using Port 587 as well, but both showing the same error.
This link below in greatest details explains how you can do this (in several ways)
static void Main(string[] args)
{
SmtpMail oMail = new SmtpMail("TryIt");
SmtpClient oSmtp = new SmtpClient();
// Your gmail email address
oMail.From = "gmailid#gmail.com";
// Set recipient email address
oMail.To = "support#emailarchitect.net";
// Set email subject
oMail.Subject = "test email from gmail account";
// Set email body
oMail.TextBody = "this is a test email sent from c# project with gmail.";
// Gmail SMTP server address
SmtpServer oServer = new SmtpServer("smtp.gmail.com");
// Set 465 port
oServer.Port = 465;
// detect SSL/TLS automatically
oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;
// Gmail user authentication
// For example: your email is "gmailid#gmail.com", then the user should be the same
oServer.User = "gmailid#gmail.com";
oServer.Password = "yourpassword";
try
{
Console.WriteLine("start to send email over SSL ...");
oSmtp.SendMail(oServer, oMail);
Console.WriteLine("email was sent successfully!");
}
catch (Exception ep)
{
Console.WriteLine("failed to send email with the following error:");
Console.WriteLine(ep.Message);
}
}
I am able to send emails successfully from LocalHost.
After hosting my website i am unable to send.
The following is the error:
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. ha10sm40374374pbc.23 - gsmtp
can anyone help me to solve this.
Below is code:
public void SendMail(string ToMail, string subject, string Message)
{
// Gmail Address from where you send the mail
string fromAddress = "mygmailid#gmail.com";
// any address where the email will be sending
//string toAddress = ToMail;
//Password of your gmail address
const string fromPassword = "********";
// Passing the values and make a email formate to display
//string subject = subject;
string body = "\n\n"+Message;
// smtp settings
var smtp = new System.Net.Mail.SmtpClient();
{
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.EnableSsl = true;
smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
smtp.Timeout = 20000;
}
// Passing values to smtp object
smtp.Send(fromAddress, ToMail, subject, body);
}
Google sent a mail with the subjact "Suspicious sign in prevented"
I selected it's me only option.
Then changed the Gmail password and used it in the application .
Now able to send the mails from the production server also...
Try below code:
using (MailMessage mailMessage = new MailMessage())
{
mailMessage.From = new MailAddress(email);
mailMessage.Subject = "YOUR_SUBJECT";
mailMessage.Body = "YOUR_MAIL_BODY";
mailMessage.To.Add(new MailAddress("RECIPIENT_EMAILID"));
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.EnableSsl = true;
System.Net.NetworkCredential NetworkCred = new
System.Net.NetworkCredential();
NetworkCred.UserName = "SENDER_MAIL";
NetworkCred.Password = "SENDER_MAIL_PASSWORD";
smtp.UseDefaultCredentials = true;
smtp.Credentials = NetworkCred;
smtp.Send(mailMessage);
}
After invoking above method GOOGLE or GMAIL will send you one mail regarding security (To allow the less secure app to configure mail) then allow that one.
I want to Run Below code without
NetworkCredential nc = new Net.NetworkCredential("USERNAME", "PASSWORD").
BY using Only Exchange Host (Server Name) And Port
Im Getting Error For this code : Mailbox unavailable. The server response was: 5.7.1 Client does not have permissions to send as this sender
protected void SendEmail(object sender, EventArgs e)
{
SmtpClient smtpClient = new SmtpClient("ExchangeServerName",25);
MailMessage message = new MailMessage();
try
{
MailAddress fromAddress = new MailAddress("bala#OfficeName.com", "From Me");
MailAddress toAddress = new MailAddress("bala#OfficeName.com", "To You");
message.From = fromAddress;
message.To.Add(toAddress);
message.Subject = "Testing!";
message.Body = "This is the body of a sample message";
smtpClient.UseDefaultCredentials = true;
System.Net.NetworkCredential nc = CredentialCache.DefaultNetworkCredentials;
smtpClient.Credentials = (System.Net.ICredentialsByHost)nc.GetCredential("ExchangeServerName", 25, "Basic");
smtpClient.Send(message);
lblText.Text ="Email sent.";
}
catch (Exception ex)
{
lblText.Text = "Coudn't send the message!\n " + ex.Message;
}
}
I have done it. For more details about my code use this link.
Below Code is worked Fine with
Server : Windows Server 2003,Windows Server 2008,Windows Server 2008 R2
IIS : 6.0, 7.0
.Net Frame Wotk : 2.0,3.5,4.0
string sMessage;
SmtpClient smtpClient = new SmtpClient();
MailMessage message = new MailMessage();
try
{
//you can provide invalid from address. but to address Should be valil
MailAddress fromAddress = new MailAddress("bala#technospine.com", "BALA");
smtpClient.Host = "Exchange Server Name";
smtpClient.Port = 25;
//smtpClient.Port = 587;
smtpClient.UseDefaultCredentials = true;
message.From = fromAddress;
message.To.Add(bala#technospine.com); //Recipent email
message.Subject = _subject;
message.Body = _details;
message.IsBodyHtml = true;
//smtpClient.EnableSsl = true;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.Send(message);
sMessage = "Email sent.";
}
catch (Exception ex)
{
sMessage = "Coudn't send the message!\n " + ex.Message;
}
lblMailStatus.Text = sMessage;
You are attempting to send a mail message using Exchange. In order to do that, the sender (or sending process) must have permissions on the account it is logged in under to send on behalf of the user you are specifying as the sender. This is different from going through Exchange's SMTP mail transfer agent (MTA) in order to have Exchange receive and route an email message. So you are on the right track with knowing you should do this using SMTP, but you are just trying to use the wrong API for accomplishing this. You want to take a look at CDOSYS for sending it through the SMTP MTA without having to do user authentication. Search on System.Web.Mail.MailMessage for more specific examples - there are plenty out there. If the Exchange server does not seem to accept/deliver the SMTP message delivered to it in this fashion, you might simply need to open up its configuration a bit. In that event, the Exchange server is probably configured with tight security on routing of mail received via its SMTP MTA and just needs to have the IP address of the machine(s) you are sending these messages from configured to allow for mail forwarding.
try NetworkCredential nc = new Net.NetworkCredential("USERNAME", "PASSWORD","DOMAIN")