I am trying to send a basic email through Google Apps/Gmail using C# (System.Net.Mail/Framework 4) and I am having trouble doing so.
I am receiving the following exception: "The operation has timed out."
My code is below:
//Create the mail message
MailMessage mail = new MailMessage();
//Set the addresses
mail.From = new MailAddress("myemail#gmail.com", "My Name");
mail.To.Add(Email);
//Set the subject and bodycontent
mail.Subject = "Email Testing";
mail.Body = "This is the body of the email";
//Send the message using the SmtpClient
SmtpClient smtp = new SmtpClient();
smtp.EnableSsl = true;
smtp.Send(mail);
My web.config has the following settings:
<smtp from="myemail#gmail.com" deliveryMethod="Network">
<network host="smtp.gmail.com"
userName="myemail#gmail.com"
password="password"
port="587" />
</smtp>
During my troubleshooting I have tried:
Using my personal gmail address as well as another from a domain hosted through Google Apps.
Using ports 25, 465, and 587
Hard coding the config settings in the c# code instead of using the web.config
Sending and telneting from multiple network locations to ensure the firewall/ISP was not blocking it
Ensured that POP was enabled in the GMail settings (according to Google this should turn on the ability to send using SMTP)
Changing the send from and replyTo address to ensure they match the account (apparently a GMail necessity).
I am able to send and receive email fine through the GMail interface for both of my email accounts. I have also tried the settings and solutions offered in Question # 757987 to no avail.
Your code looks fine. You say you tried Telneting. Were you actually able to send an email through telnet?
You could try removing
from="myemail#gmail.com" deliveryMethod="Network"
from your smtp tag since they aren't necessary for what you're doing.
EDIT:
Telnet will normally allow you to connect to the smtp server and send 16 (?) bytes of data before it will kick you out. If you aren't getting responses like these, then this is likely the case.
Try opening up port 587 on your firewall and see if you can actually interact with the smtp server via telnet (EHLO, ECHO, etc.).
Related
I developed an ASP.net application that can send an email to any domain.
I'm using a simple .Net smtp client:
var fromAddress = new MailAddress("mymailid#gmail.com");
var fromPassword = "xxxxxx";
var toAddress = new MailAddress("yourmailid#yourdoamain.com");
var smtpClient = new System.Net.Mail.SmtpClient
{
Host = "smtp.gmail.com",// or any others
Port = 587, // correspond to host
EnableSsl = true,
DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network,
UseDefaultCredentials = false,
Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
smtpClient.Send(message). But I cannot authenticate to any modern mail providers(including gmail, yahoo, yandex) by using .Net.Mail because I have got the following exception The server response was: 5.5.1 Authentication Required
All of the smtp configuration fill-out correctly.
How can I use DotNetOpenAuth for authentication and .Net.Smtp for sending emails?
Please give me an example.
I'd consider your SMTP server. Is it allowing you to send email? Is your request making it to the server and being validated? Have you looked at the traffic using Fiddler?
You can sign up for a free account with SendGrid, who will provide you with a SMTP server to send the email for you. You really are better of using a company like SendGrid instead of the gmail SMTP server.
Other than that, Mail4Net might help you in your code.
To use GMail as a SMTP Server, you have to set some values:
Outgoing Mail (SMTP) Server: smtp.gmail.com
Use Authentication: Yes
Use Secure Connection: Yes (this can be TLS or SSL depending on your mail client)
Username: your GMail account, i.e. user#gmail.com
Password: your GMail password
Port: 465 or 587
You can also move your connection to the web or app config file:
<configuration>
<system.net>
<mailSettings>
<smtp deliveryMethod="network" from="pam#gmail.com">
<network
host="smtp.gmail.com"
port="465"
enableSsl="true"
userName="pam#gmail.com"
password="password"
/>
</smtp>
</mailSettings>
</system.net>
</configuration>
OK, I know I am adding a lot of answers, but here are my findings after looking at this for several hours:
The error is the client is not authenticated (5.5.1)
I got the same error, then I noticed an email in my inbox (the gmail account is seldom used) saying Someone tried to sign in to your Google Account xxxxx#gmail.com from an app that doesn't meet modern securty standards.
Is you app blocked by google: http://security.google.com/settings/security/activity might show your app, but are you getting an email?
Also, if the account uses 2 step authentication, the email will not be sent without setting an application specific password: https://support.google.com/accounts/answer/185833
I think this is account configuration instead of a problem with your code.
This code works for me, once the email and credentials are updated:
try
{
var message = new MailMessage();
message.Subject = "Test email";
message.Body = "This is a test message";
message.From = new MailAddress("from#email.com");
message.To.Add(new MailAddress("to#email.com"));
var client = new SmtpClient
{
Host = "smtp.sendgrid.com",
Port = 587,
Credentials = new NetworkCredential("User_Name", "My_Password")
};
client.Send(message);
}
catch (Exception ex)
{
var msg = ex.Message;
}
Make sure your SendGrid credentials are correct.
From the comments, I can see the image, showing what you are trying to do:
However, you cannot know what the configurations are going to be and users will select configurations that are not correct. What will you do if the user selects TLS, but there is no TLS support from the mail server?
I think you need to add a Send Test Email button, to send a test email to check the configuration. You can then show any errors that are encountered.
i am trying to send email from c# windows application and i need SMTP Server Address to send email but i don't know about SMTP Server Address, what is SMTP Server Address, how to get SMTP Server Address and how to use it.
this is the code:
System.Web.Mail.MailMessage message=new System.Web.Mail.MailMessage();
message.From="from e-mail";
message.To="to e-mail";
message.Subject="Message Subject";
message.Body="Message Body";
System.Web.Mail.SmtpMail.SmtpServer="SMTP Server Address";
System.Web.Mail.SmtpMail.Send(message);
What Mail Server are you trying to use??? usually you can just google SMTP or POP3 or whatever protocal your looking for and it will give you the port, server and all the extra information you need to connect to it.
For example:
http://support.google.com/mail/bin/answer.py?hl=en&answer=13287
First, the System.Web.Mail namespace utilities are marked as 'obsolete' and should not be used. Instead, you should use System.Net. In that namespace there is a 'MailMessage' and an 'SmtpClient' class that will do the job you are trying to do.
Next, an SMTP server is a process that runs on a computer, which, when connected to the inetrnet, can listen for, and respond to, incoming requests which use a particular protocol on a particular port. You can think of an SMTP server as the machine at the post office that sorts and routes the mail to the appropriate mailbox..
An SMTP server has an address, just like everything else on the internet that needs to communicate with anything else. The address is used to send your mail message to the right machine, on the right communication channel. you could think of it as its phone number, and your mail message a text that will be sent to it.
Next, the address you are looking for, last time I checked, was: smtp.gmail.com.
So, considering that you need to stop using System.Web.Mail, and considering that your address may be smtp.gmail.com, here is what your code should look like:
// setup mail message
MailMessage message = new MailMessage();
message.From = new MailAddress("from e-mail");
message.To.Add(new MailAddress("to e-mail"));
message.Subject = "Message Subject";
message.Body = "Message Body";
// setup mail client
SmtpClient mailClient = new SmtpClient("smtp.gmail.com");
mailClient.Credentials = new NetworkCredential("youraccount#gmail.com", "yourGmailPassword");
// send message
mailClient.Send(message);
Also, here is a decent looking article on using gmail as your smtp server:
How to use Gmail as your SMTP server
Also, if gmail does not work for you, you can use the smtp server of your internet provider. They will usually have their smtp address lurking on their website somewhere to be helpful to customers who want to setup their email program. You can also look in Outlook under account settings if you cannot find it somewhere else, if you use anything besides gmail, you should find one there.
Lastly, keep in mind, email cannot be sent without using an smtp server which is willing to receive and dispatch your maill message. In general this is something like gmail, or the smtp server of your internet provider, and the address will normally be: smtp.providername.com. However, gmail, for example, requires your account credentials for the smtp server to allow your message to be received and dispatched.
I have an SmtpClient which I pointed to my company's mail server. I am able to successfully send emails to/from address on that domain.
However, I need to do password resets and notifications for users of an app. Those users sign up using their own email address (multiple different domains).
How can I send an email to a user of a different domain? Every time I try (using my live.ca email), I get the following error:
SmtpFailedRecipientsException - Mailbox unavailable. The server response was: 5.7.1 Unable to relay
C# Code
SmtpClient mailClient = new SmtpClient();
MailMessage email = new MailMessage
{
Subject = "Testing Mail",
Body = "Testing Mail",
From = new MailAddress("myAddress#myCompany.com")
};
email.To.Add(new MailAddress("myAddress#live.ca"));
mailClient.Send(email);
Web.config Code
<system.net>
<mailSettings>
<smtp>
<network host="mail.myCompany.com" port="25" userName="myAddress#myCompany.com" password="myPassword" defaultCredentials="false"/>
</smtp>
</mailSettings>
Update:
I've got it working using the following methods:
1) Web.config
<network host="mail.myCompany.com" port="25" userName="myNetworkUsername" password="myPassword" defaultCredentials="false" />
2) C# Code
mailClient.Credentials = new NetworkCredential("myNetworkUsername", "myPassword");
// or
mailClient.Credentials = CredentialCache.DefaultNetworkCredentials;
The 2nd line uses the credentials of whoever is logged in. It worked for local host but not when I deployed it.
I'm thinking of creating a default account for handling the app's mail and putting the username/pw in the web config, but this doesn't seem like the most secure practice. I'm still looking into the alternatives.
Update:
The code stopped working when my company switched our ISP to Shaw. We think Shaw may be blocking a port on our Exchange Server.
Here's an article that explains the use of port 587 for sending emails outside of domains: http://mostlygeek.com/tech/smtp-on-port-587
I am using ASP.NET Web forms and sending an automated email through our SMTP Emailing system. In my web.config I added this:
<mailSettings>
<smtp from="username#domain.com">
<network host="111.111.1.1" port="25" defaultCredentials="true" />
</smtp>
</mailSettings>
Now I am writing this code to send an email:
MailMessage message = new MailMessage();
message.From = new MailAddress("username#domain.com");
message.To.Add(new MailAddress("username1#domain.com"));
message.CC.Add(new MailAddress("username2#domain.com"));
message.Subject = "Testing";
message.Body = bodymessage;
SmtpClient client = new SmtpClient();
client.Send(message);
At the last line I am getting this error mesg:
{"Mailbox unavailable. The server response was: 5.7.1 Client does not
have permissions to send as this
sender"}
What is wrong here?
Perhaps there is authentication on the SMTP server? Try using
client.Credentials = new System.Net.NetworkCredential(username, password);
This is a message from your SMTP relay server. Your code is working fine, but the message you're receiving back is saying that you don't have permissions to send on behalf of the e-mail address you provided in the "From".
Here's some stuff that might help:
Your SMTP server may require authorization credentials
Your SMTP server may not allow emails to go out from addresses outside of the current domain. Check with your provider.
You may need to add the e-mail address to an exception list
SMTP is not configured properly on the server. Check the IIS of server or contact hosting support.
Is there a way, in C# code, to send an email without having to know the SMTP server configuration, etc on the server, or have any of that stuff set up?
The code I'm developing will be deployed to a live server, but I know nothing about the configuration, so I can't predict what the SMTP server will be.
Add this to your web.config (MSDN reference here):
<system.net>
<mailSettings>
<smtp deliveryMethod="Network" from="jdoe#example.com">
<network host="localhost" port="25" />
</smtp>
</mailSettings>
</system.net>
Using SmtpClient without specifying configuration settings will use the values from the web.config:
MailMessage msg = new MailMessage(...);
// build message contents
SmtpClient client = new SmtpClient();
client.Send(msg);
I answered a question similar to this not to long ago. You can view it here. Using papercut, you can test your application without knowing or using the actual production smtp server.
Then during testing you can just set the host to your local machine that is running papercut in the app/web config. Therefore it can be changed once moving to production.
Papercut will show you the emails that were sent and also the contents.
The best answer is if you know nothing until live, can you move all the settings into web.config? This will allow configuration up until the last minute. Below is some code to dump into your web.config file. I would question as to why you don't have access to this information though
<system.net>
<mailSettings>
<smtp from="you#yourdomain.com">
<network host="SMTP SERVER ADDRESS" port="25"
userName="USERNAME" password="PASSWORD">
</smtp>
</mailSettings>
</system.net>
As an alternative: If you don't want to rely on the server configuration and do it programmatically you could always do this:
MailMessage mail = new MailMessage() {
To = "someone#somewhere",
From = "someone#somewhere",
Subject = "My Subject",
Body = "My message"
};
SmtpClient client = new SmtpClient("SMTP Server Address");
// Naturally you change the "SMTP Server Address" to the
// actual SMTP server address
client.Send(mail);
But I suggest you stick it in web.config file (which can be configured through ASP.NET Web Configuration tool as well).
Try this from google
http://mailsystem.codeplex.com/
If your SMTP configuration is correct, just do this:
MailMessage mail = new MailMessage();
mail.To = "To";
mail.From = "From";
mail.Subject = "Subject";
mail.Body = "Body";
SmtpMail.SmtpServer = "localhost";
SmtpMail.Send(mail);
Yeah you can use tools like SMTP4Dev to 'send' emails without having an SMTP server at all. I use this frequently for testing to ensure I'm not actually sending emails to real users by mistake.
More info # http://netdevtools.com/how-to-test-smtp-emails-without-a-mail-server-no-smtp-configuration-required-in-asp-net-c/