send email:
public class SendMail {
public void sendEmail(final String from, final String password,String toAddress) {
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
Session session = Session.getDefaultInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(from,password);
}
});
try
{
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(toAddress));
message.setSentDate(new Date());
message.setSubject("Account Activation for T20home");
message.setContent("Hello", "text/html");
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com", from, password);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
catch(MessagingException mex)
{
}
}
}
I can send emails like this:
SendMail send = new SendMail()
send.sendEmail("mailFrom1#gmail.com", "pass1","to1")
SendMail send1 = new SendMail()
send1.sendEmail("mailFrom2#gmail.com", "pass2","to1")
it works good, but come two letters from mailFrom1#gmail.com to email "to1".
Must come one letter from "mailFrom1#gmail.com" and one letter from "mailFrom2#gmail.com"
setFrom not working
You've made several common mistakes described in the JavaMail FAQ (the dangers of cut&paste programming). Once you fix them, I suspect you'll run into a different problem, but let's see...
Related
I created a C# console application to send email using Microsoft Graph API. On adding Mail.Send Application Permission, it works fine. But, because of company requirements, I was asked to use Mail.Send Delegated Permission instead and with that permission I don't see it working and I see this error:
Are there any steps I should consider doing after adding Mail.Send Delegated Permission in order to get this working?
Here is my code:
static void Main(string[] args)
{
// Azure AD APP
string clientId = "<client Key Here>";
string tenantID = "<tenant key here>";
string clientSecret = "<client secret here>";
Task<GraphServiceClient> callTask = Task.Run(() => SendEmail(clientId, tenantID, clientSecret));
// Wait for it to finish
callTask.Wait();
// Get the result
var astr = callTask;
}
public static async Task<GraphServiceClient> SendEmail(string clientId, string tenantID, string clientSecret)
{
var confidentialClientApplication = ConfidentialClientApplicationBuilder
.Create(clientId)
.WithTenantId(tenantID)
.WithClientSecret(clientSecret)
.Build();
var authProvider = new ClientCredentialProvider(confidentialClientApplication);
var graphClient = new GraphServiceClient(authProvider);
var message = new Message
{
Subject = subject,
Body = new ItemBody
{
ContentType = BodyType.Text,
Content = content
},
ToRecipients = new List<Recipient>()
{
new Recipient
{
EmailAddress = new EmailAddress { Address = recipientAddress }
}
}
};
var saveToSentItems = true;
await _graphClient.Users[<userprincipalname>]
.SendMail(message, saveToSentItems)
.Request()
.PostAsync();
return graphClient;
}
UPDATE:
Based on below answer, I updated code as follows:
var publicClientApplication = PublicClientApplicationBuilder
.Create("<client-id>")
.WithTenantId("<tenant-id>")
.Build();
var authProvider = new UsernamePasswordProvider(publicClientApplication);
var secureString = new NetworkCredential("", "<password>").SecurePassword;
User me = await graphClient.Me.Request()
.WithUsernamePassword("<username>", secureString)
.GetAsync();
I enabled "Allow public client flows" to fix an exception.
And now I see another exception: Insufficient privileges to complete the operation.
What am I missing?
UPDATE: Currently I see this exception with no changes in the code:
The code you provided shows you use client credential flow to do the authentication. When you use Mail.Send Application permission, use client credential flow is ok. But if you use Mail.Send Delegated permission, we can not use client credential. You should use username/password flow to do authentication.
=================================Update===================================
Below is my code:
using Microsoft.Graph;
using Microsoft.Graph.Auth;
using Microsoft.Identity.Client;
using System;
using System.Collections.Generic;
using System.Security;
namespace ConsoleApp34
{
class Program
{
static async System.Threading.Tasks.Task Main(string[] args)
{
Console.WriteLine("Hello World!");
var publicClientApplication = PublicClientApplicationBuilder
.Create("client id")
.WithTenantId("tenant id")
.Build();
string[] scopes = new string[] { "mail.send" };
UsernamePasswordProvider authProvider = new UsernamePasswordProvider(publicClientApplication, scopes);
GraphServiceClient graphClient = new GraphServiceClient(authProvider);
var message = new Message
{
Subject = "Meet for lunch?",
Body = new ItemBody
{
ContentType = BodyType.Text,
Content = "The new cafeteria is open."
},
ToRecipients = new List<Recipient>()
{
new Recipient
{
EmailAddress = new EmailAddress
{
Address = "to email address"
}
}
}
};
var securePassword = new SecureString();
foreach (char c in "your password")
securePassword.AppendChar(c);
var saveToSentItems = true;
await graphClient.Me
.SendMail(message, saveToSentItems)
.Request().WithUsernamePassword("your email", securePassword)
.PostAsync();
}
}
}
The reason for your error message Insufficient privileges to complete the operation is you use the code:
User me = await graphClient.Me.Request()
.WithUsernamePassword("<username>", secureString)
.GetAsync();
This code is used to get the user(me)'s information but not send email, you haven't added the permission to the app. So it will show Insufficient privileges to complete the operation. Please remove this code and use the code block in my code instead:
await graphClient.Me.SendMail(message, saveToSentItems)
.Request().WithUsernamePassword("your email", securePassword)
.PostAsync();
==============================Update2====================================
I have a process that must check the INBOX on GMail for a failure message, it's working except for the problem of the time it takes to connect and check the message, it takes about 1 minute, that is too much time.
My code:
public static SendResult sendingSuccess(final String email) {
SendResult result = new SendResult();
try {
Properties props = new Properties();
props.setProperty("mail.store.protocol", "imaps");
props.setProperty("mail.imap.com", "993");
props.setProperty("mail.imap.connectiontimeout", "5000");
props.setProperty("mail.imap.timeout", "5000");
Session session = Session.getDefaultInstance(props);
Store store = session.getStore("imaps");
store.connect("imap.googlemail.com", 993, GMAIL_USER, GMAIL_PASSWORD);
// Select and open folder
Folder inbox = store.getFolder("INBOX");
inbox.open(Folder.READ_WRITE);
// What to search for
SearchTerm searchTerm = new SearchTerm() {
private static final long serialVersionUID = -7187666524976851520L;
public boolean match(Message message) {
try {
String content = getContent(message);
boolean daemon = (message.getFrom()[0].toString()).contains("mailer-daemon#googlemail.com");
boolean failure = message.getSubject().contains("Failure");
boolean foundWarning = content.contains(email);
if (daemon && failure && foundWarning) {
return true;
}
} catch (Exception ex) {
ex.printStackTrace();
}
return false;
}
};
// Fetch unseen messages from inbox folder
Message[] messages = inbox.search(searchTerm);
// If there is no message then it's OK
result.setStatus(messages.length == 0);
result.setMessage(result.isStatus() ? "No failure message found for " + email : "Failure message found for " + email);
// Flag message as DELETED
for (Message message : messages) {
message.setFlag(Flags.Flag.DELETED, true);
}
// disconnect and close
inbox.close(false);
store.close();
} catch (Exception ex) {
result.setMessage(ex.getMessage());
ex.printStackTrace();
}
return result;
}
When I run this code to query the failure message it takes more than 1 minute to return the result to me.
======= Checking Gmail account for message failure! =====
Start...: 09:00:33
Finish..: 09:01:01
Result..: SendResult [status=true, message=No failure found for wrong.user#gmxexexex.net]
Is there any way to reduce this time?
The problem is most likely because you've written your own search term. JavaMail doesn't know how to translate your search term into an IMAP SEARCH request so it executes the search on the client, which requires downloading all the messages to the client to search there. Try this instead:
SearchTerm searchTerm = new AndTerm(new SearchTerm[] {
new FromStringTerm("mailer-daemon#googlemail.com"),
new SubjectTerm("Failure"),
new BodyTerm(email)
});
That will allow the search to be done by the IMAP server.
My file resides on some location on my machine say C://users//abc.txt and i want to write a java program to transfer this file using REST API over HTTP. I used MockHttpServelet Request to create the request, but somehow i am unable to transfer the file
Use HttpClient:
String url = "http://localhost:8080/upload"; // Replace with your target 'REST API' url
String filePath = "C://users//abc.txt";
CloseableHttpClient httpClient = HttpClients.createDefault();
try {
HttpPost httpPost = new HttpPost(url);
FileEntity entity = new FileEntity(new File(filePath), ContentType.TEXT_PLAIN);
httpPost.setEntity(entity);
HttpResponse httpResponse = httpClient.execute(httpPost);
System.out.println(httpResponse.getStatusLine().getStatusCode()); // Check HTTP code
} finally {
httpClient.close();
}
With Authentication:
String url = "http://localhost:8080/upload"; // Replace with your target 'REST API' url
String filePath = "C://users//abc.txt";
String username = "username"; // Replace with your username
String password = "password"; // Replace with your password
RequestConfig requestConfig =
RequestConfig.custom().
setAuthenticationEnable(true).
build();
CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(
AuthScope.ANY,
new UsernamePasswordCredential(username, password));
CloseableHttpClient httpClient =
HttpClients.custom().
setDefaultRequestConfig(requestConfig).
setDefaultCredentialsProvider(credentialsProvider).
build();
try {
HttpPost httpPost = new HttpPost(url);
FileEntity entity = new FileEntity(new File(filePath), ContentType.TEXT_PLAIN);
httpPost.setEntity(entity);
HttpResponse httpResponse = httpClient.execute(httpPost);
System.out.println(httpResponse.getStatusLine().getStatusCode()); // Check HTTP code
} finally {
httpClient.close();
}
String location="C:\\Usersabc.img";
Path path = Paths.get(location);
String name=location.substring(location.lastIndexOf("\\")+1);
MultipartEntity multipart= new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
try {
multipart.addPart("image", new ByteArrayBody(Files.readAllBytes(path), ContentType.APPLICATION_OCTET_STREAM.getMimeType(),name));
}
catch (IOException ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
}
I need help with sending email w/attachment using Gmail Api in c#.
I have read Google website on sending emails with attachment but the example is in java.
Its too late for the answer, but posting it in case anyone needs it:)
Need MimeKit library for this: can be installed from NuGet.
Code:
public void SendHTMLmessage()
{
//Create Message
MailMessage mail = new MailMessage();
mail.Subject = "Subject!";
mail.Body = "This is <b><i>body</i></b> of message";
mail.From = new MailAddress("fromemailaddress#gmail.com");
mail.IsBodyHtml = true;
string attImg = "C:\\Documents\\Images\\Tulips.jpg OR Any Path to attachment";
mail.Attachments.Add(new Attachment(attImg));
mail.To.Add(new MailAddress("toemailaddress.com.au"));
MimeKit.MimeMessage mimeMessage = MimeKit.MimeMessage.CreateFromMailMessage(mail);
Message message = new Message();
message.Raw = Base64UrlEncode(mimeMessage.ToString());
//Gmail API credentials
UserCredential credential;
using (var stream =
new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
{
string credPath = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.Personal);
credPath = Path.Combine(credPath, ".credentials/gmail-dotnet-quickstart2.json");
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
Scope,
"user",
CancellationToken.None,
new FileDataStore(credPath, true)).Result;
Console.WriteLine("Credential file saved to: " + credPath);
}
// Create Gmail API service.
var service = new GmailService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = ApplicationName,
});
//Send Email
var result = service.Users.Messages.Send(message, "me/OR UserId/EmailAddress").Execute();
}
Scope can be:
GmailSend or GmailModify
static string[] Scope = { GmailService.Scope.GmailSend };
static string[] Scope = { GmailService.Scope.GmailModify };
Base64UrlEncode function:
private string Base64UrlEncode(string input)
{
var inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
return Convert.ToBase64String(inputBytes)
.Replace('+', '-')
.Replace('/', '_')
.Replace("=", "");
}
I have an example in VB.net. GMail API Emails Bouncing.
Google page provides examples in Java and Python only. The objects being used in the Java example are not available in .Net version of API. It is not possible to translate those examples.
Fortunately, it is quite easy to do the same in C#/VB. Just use plain old Net.Mail.MailMessage to create a message including attachments, then use MimeKit (NuGet it) to convert the message into string and pass the string (after encoding Base64) to "Raw" field of message.send of Gmail API.
There's nothing particular to sending an attachment with the Gmail API. Either way the Gmail API message.send() takes a full RFC822 email message in the message.raw field (urlsafe base64 encoded). The main trick is building up such an RFC822 email message string in your language. I imagine there are some MIME message librarys in C# and that's the main issue is finding those libraries. I don't do C# but javax.internet.mail.MimeMessage works well in java and the 'email' module is good for python.
This other post seems relevant:
How to send multi-part MIME messages in c#?
string[] Scopes = { GmailService.Scope.GmailSend };
string ApplicationName = "Gmail API App";
public GmailForm()
{
InitializeComponent();
SendHTMLmessage();
}
string Base64UrlEncode(string input)
{
var data = Encoding.UTF8.GetBytes(input);
return Convert.ToBase64String(data).Replace("+", "-").Replace("/", "_").Replace("=", "");
}
public void SendHTMLmessage()
{
//Create Message
MailMessage mail = new MailMessage();
mail.Subject = "Subject!";
mail.Body = "This is <b><i>body</i></b> of message";
mail.From = new MailAddress("youremail#gmail.com");
mail.IsBodyHtml = true;
string attImg = "C:\\attachment.pdf";
mail.Attachments.Add(new Attachment(attImg));
mail.To.Add(new MailAddress("receiver#mail.com"));
MimeKit.MimeMessage mimeMessage = MimeKit.MimeMessage.CreateFromMailMessage(mail);
var msg = new Google.Apis.Gmail.v1.Data.Message();
msg.Raw = Base64UrlEncode(mimeMessage.ToString());
//Gmail API credentials
UserCredential credential;
using (var stream =new FileStream(Application.StartupPath + #"/credentials.json", FileMode.Open, FileAccess.Read))
{
string credPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
credPath = Path.Combine(credPath, ".credentials/gmail-dotnet-quickstart2.json");
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(GoogleClientSecrets.Load(stream).Secrets,Scopes,"user",CancellationToken.None,new FileDataStore(credPath, true)).Result;
Console.WriteLine("Credential file saved to: " + credPath);
}
// Create Gmail API service.
var service = new GmailService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = ApplicationName,
});
//Send Email
var result = service.Users.Messages.Send(msg, "me").Execute();
MessageBox.Show("Your email has been successfully sent !", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
I'm developing a web app that needs to send reminders to the customers. I'm using JavaMail for the same.but when I provide invalid receivers email address (email id that does not exist) the program does not throw SendFailedException. but inbox of the sender email id contains delivery report saying mail sending failed. Is there any way to detect this failure in the program? The code used is as follows:
[note that gmail smpt is used]
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.stmp.user", "abc#gmail.com");
//If you want you use TLS
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.password", "password");
// If you want to use SSL
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
Session session = Session.getDefaultInstance(props, new Authenticator() {
#Override
protected PasswordAuthentication getPasswordAuthentication() {
String username = "abc#gmail.com";
String password = "password";
return new PasswordAuthentication(username,password);
}
});
String[] to = {"test1#gmail.com","test2#yahoo.in","test3#gmail.com","test4#gmail.com"};
String from = "abc#gmail.com";
String subject = "Testing...";
MimeMessage msg = new MimeMessage(session);
try {
msg.setFrom(new InternetAddress(from));
InternetAddress[] addressTo = new InternetAddress[to.length];
for (int i = 0; i < to.length; i++)
{
addressTo[i] = new InternetAddress(to[i]);
}
msg.setRecipients(RecipientType.TO, addressTo);
// msg.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(to));
msg.setSubject(subject);
// msg.setText("JAVA is the BEST");
// Create the message part
BodyPart messageBodyPart = new MimeBodyPart();
// Fill the message
messageBodyPart.setText("This is message body");
// Create a multipar message
Multipart multipart = new MimeMultipart();
// Set text message part
multipart.addBodyPart(messageBodyPart);
// Part two is attachment
messageBodyPart = new MimeBodyPart();
String filename = "file.txt";
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(filename);
multipart.addBodyPart(messageBodyPart);
// Send the complete message parts
msg.setContent(multipart );
Transport transport = session.getTransport("smtp");
transport.send(msg);
System.out.println("E-mail sent !");
}
catch(Exception exc) {
System.out.println(exc);
}
}
}
You may have misunderstood how "store and forward" works for email: only very rarely will the sender immediately know that the address is invalid. This would most likely be the case for an invalid domain name, but even then you don't have any guarantees that your SMTP-session will report the error, since it depends on how the MTA you're delivering to handles email.