I'm developing an windows application in which i need to send some files as attachment through email.
Code
public string SendMail(string mFrom,
string mPass,
string mTo,
string mSub,
string mMsg,
string mFile,
bool isDel)
{
string sql = "";
try
{
System.Net.Mail.MailAddress mailfrom = new System.Net.Mail.MailAddress(mFrom);
System.Net.Mail.MailAddress mailto = new System.Net.Mail.MailAddress(mTo);
System.Net.Mail.MailMessage newmsg = new System.Net.Mail.MailMessage(mailfrom, mailto);
newmsg.IsBodyHtml = false;
if (mFile.Length > 2
&& File.Exists(mFile))
{
System.Net.Mail.Attachment att = new System.Net.Mail.Attachment(mFile);
newmsg.Attachments.Add(att);
}
newmsg.Subject = mSub;
newmsg.Body = mMsg;
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587);
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential(mFrom, mPass);
smtp.EnableSsl = true;
smtp.Send(newmsg);
newmsg.Dispose();
GC.Collect();
sql = "OK";
if (isDel
&& File.Exists(mFile))
{
File.Delete(mFile);
}
}
catch (Exception ex)
{
sql = ex.Message;
}
return sql;
}
This code works fine for small files.But i need to send large files up to 1-2 GB.
For that what to do.
You cannot use e-mail to get these files across and this has nothing to do with your code.
I don't think there is ANY provider out there who will support sending files of that size let alone receiving them. Even G-Mail has a limit of 25 Mb which is quite large already.
E-Mail is not the proper channel to do this.
So the problem will not be in your code, the provider will limit the size of the attachment and just refuse them when you present them with a larger file. You will get an e-mail back at your FROM address stating that the file is too large and your e-mail did not get across.
For doing this in the simplest form probably look at FTP.
I do agree with Gerald Versluis in that email is not the proper channel for this. Even if you are using your own email server that is configurable there is probably some internal limit that prevents it from sending such big files.
I’d go with FTP for this but if you really want to continue with email I’d suggest you check following first.
Is there connection timeout property on the server? If yes then try to increase it to 3 hours or something like that.
Is there enough space on the mail server?
Is there some documentation for your email server? Are there any additional details regarding attachment size ?
Related
I want to create a mailing list via asp.net .I've studied a lots of article about it . but all of them were the same .in those article was written that I should use this code
var list = from c in context.Emails orderby c.EmailAddress select c.EmailAddress;
MailMessage mail = new MailMessage();
foreach (var c in list)
{
try
{
mail.From = new MailAddress(txtfrom.Text);
mail.To.Add(new MailAddress(c.ToString()));
mail.Subject = txtSub.Text;
mail.IsBodyHtml = true;
mail.Body = txtBody.Text;
if (FileUpload1.HasFile)
{
mail.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName));
}
SmtpClient smtp = new SmtpClient();
smtp.Send(mail);
}
catch (Exception)
{
}
}
so the question is that ,is this way really useful and successful to sending lots of emails? (for example 2000 emails?)
in those articles was written that i should put delay after each period times (for example after sending 50 emails).and I wanna know how to make delay between sending emails.
I'm looking for a perfessional way to create this project
I was wondering if someone gives me open source mailing list in asp.net
I'd change the code like this
var list = from c in context.Emails orderby c.EmailAddress select c.EmailAddress;
MailMessage mail = new MailMessage();
try
{
mail.From = new MailAddress(txtfrom.Text);
foreach (var c in list)
{
mail.To.Add(new MailAddress(c.ToString()));
}
mail.Subject = txtSub.Text;
mail.IsBodyHtml = true;
mail.Body = txtBody.Text;
if (FileUpload1.HasFile)
{
mail.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName));
}
SmtpClient smtp = new SmtpClient();
smtp.Send(mail);
}
catch (Exception)
{
//exception handling
}
At least, smtp.Send() is invoked only once.
Try using multiple threads, here is an example; msdn forum sendin bulk mails
Probably, you have some time limit for running you script (i.e 30 seconds). I suggest split into 2 steps:
format e-mails you need and write them into database table (with status - "not sent")
run another script/program, select N e-mails from table, send and mark them as "sent"
wait/sleep N seconds
repeat 2nd step
This lets you to send almost unlimit number of e-mails, w/o timeout
Also - pay attention if you have some limit on sending e-mails per hour/day on your hosting!
Create work items for emails to be sent and push them to queue. Then use as many competing consumers (aka workers) as you want to send those emails.
The asp app only needs to create an XML with the info and save it.
Use a windows service with a filewatcher. This service only detect the creation of the list in XML and send it.
I want to get all emails in my ASP.NET application that have a certain CC-recipient. To use this for future emails I didn't want to polling all the time to get them. But I can't find a way, how I can use push to get the emails instantly. Are their any frameworks in C# to help me for this?
I want to connect with my application to a mail server and register a method 'X'. Always when a new message arrived to the mail server, my application have to be notified and my application should execute the method 'X'.
I hope that this is possible with code like this:
void Application_Start()
{
...
ConnectWithTheSmtpServer();
RegisterMethodForNotification(DoSomethink);
...
}
void DoSomethink(Mail newMail)
{
// Do Somethink with the mail
}
EDIT:
I did it with the MailSystem.Net. It works very fine and is very easy to implement.
Sample Code:
void Application_Start()
{
var worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler(StartIdleProcess);
if (worker.IsBusy)
worker.CancelAsync();
worker.RunWorkerAsync();
}
private void StartIdleProcess(object sender, DoWorkEventArgs e)
{
if (_imap != null && _imap.IsConnected)
{
_imap.StopIdle();
_imap.Disconnect();
}
_imap = new Imap4Client();
_imap.ConnectSsl(server-name, 993);
_imap.Login(username, passwort);
var inbox = _imap.SelectMailbox("INBOX");
_imap.NewMessageReceived += new NewMessageReceivedEventHandler(NewMessageReceived);
inbox.Subscribe();
_imap.StartIdle();
}
public static void NewMessageReceived(object source, NewMessageReceivedEventArgs e)
{
// Do something with the source...
}
You are approaching this from the wrong angle.
SMTP does not support receiving mail (never mind PUSH mail). POP3 is what you can use for retrieving mail, but it does not have support for PUSH either (so you would have to pull for mail).
The IMAP4 IDLE extension is what most refer to as PUSH mail - so you will need to find a library for C# that supports IMAP4 IDLE. I found some information that will get you going in the right direction (no reason to duplicate it here):
Using C# .Net Libraries to Check for IMAP Messages
Accessing IMAP in C#
Keep in mind when choosing a solution that it needs to support IDLE.
I really like the look of MailSystem.Net as it fulfills your requirements.
Remember that your mail server also needs to have IMAP4 and IMAP4 IDLE enabled. Some mail servers don't support it, so you might be clean out of luck (and will have to use POP3 pulling).
You could send a copy of your emails(i.e. using /etc/aliases file in PostFix) to a MAIL SERVER YOU CAN HANDLE. Once there, you can implement a MAIL PROCESSOR that do whatever you want anytime a mail that MEET CERTAIN CONDITIONS arrives.
Hope that helps,
You can try this:
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using EAGetMail; //add EAGetMail namespace
namespace receiveemail
{
class Program
{
static void Main(string[] args)
{
// Create a folder named "inbox" under current directory
// to save the email retrie enter code here ved.
string curpath = Directory.GetCurrentDirectory();
string mailbox = String.Format("{0}\\inbox", curpath);
// If the folder is not existed, create it.
if (!Directory.Exists(mailbox))
{
Directory.CreateDirectory(mailbox);
}
// Gmail IMAP4 server is "imap.gmail.com"
MailServer oServer = new MailServer("imap.gmail.com",
"gmailid#gmail.com", "yourpassword", ServerProtocol.Imap4 );
MailClient oClient = new MailClient("TryIt");
// Set SSL connection,
oServer.SSLConnection = true;
// Set 993 IMAP4 port
oServer.Port = 993;
try
{
oClient.Connect(oServer);
MailInfo[] infos = oClient.GetMailInfos();
for (int i = 0; i < infos.Length; i++)
{
MailInfo info = infos[i];
Console.WriteLine("Index: {0}; Size: {1}; UIDL: {2}",
info.Index, info.Size, info.UIDL);
// Download email from GMail IMAP4 server
Mail oMail = oClient.GetMail(info);
Console.WriteLine("From: {0}", oMail.From.ToString());
Console.WriteLine("Subject: {0}\r\n", oMail.Subject);
// Generate an email file name based on date time.
System.DateTime d = System.DateTime.Now;
System.Globalization.CultureInfo cur = new
System.Globalization.CultureInfo("en-US");
string sdate = d.ToString("yyyyMMddHHmmss", cur);
string fileName = String.Format("{0}\\{1}{2}{3}.eml",
mailbox, sdate, d.Millisecond.ToString("d3"), i);
// Save email to local disk
oMail.SaveAs(fileName, true);
// Mark email as deleted in GMail account.
oClient.Delete(info);
}
// Quit and purge emails marked as deleted from Gmail IMAP4 server.
oClient.Quit();
}
catch (Exception ep)
{
Console.WriteLine(ep.Message);
}
}
}
}
i have a problem with send mail in c#; it doesn't send any mail and also doesn't throw any exceptions with failure :
using System.Web.Util;
public static void SendEmail(string _FromEmail, string _ToEmail, string _Subject, string _EmailBody)
{
// setup email header .
SmtpMail.SmtpServer = "localhost";
MailMessage _MailMessage = new MailMessage();
_MailMessage.From = _FromEmail;
_MailMessage.To = _ToEmail;
_MailMessage.Subject = _Subject;
_MailMessage.Body = _EmailBody;
try
{
SmtpMail.Send(_MailMessage);
}
catch (Exception ex)
{
throw new ApplicationException("error has occured: " + ex.Message);
}
}
please help!
Check the folders in your IIS' Mailroot directory (probably located in C:\InetPub\Mailroot). Chances are your mails are dropped there, probably in the Badmail or the Queue directory.
see C:\InetPub\Mailroot\queue folder. if your emails got stuck in this folder then
1>> stop your SMTP
2>> move emails from queue folder to C:\inetpub\mailroot\Pickup folder and start your smtp server and wait for few seconds.
if your email got stuck in queue folder again then you need to enable smtp logging for more information. use this link to see how to enable smtp logging.
http://www.msexchange.org/tutorials/Logging_the_SMTP_Service.html
I was wondering if it is possible through the .NET 2.0 MailMessage object to send an inline MHTML file that is created on the fly.
By inline I mean: It should be sent in a way that the user can see it, once he opens the email, without having to open/download the attachment.
It's a bit tricky, but yes, you can do it. In fact MailMessage class is nothing more than a wrapper above the system's CDO.Message class which can do the trick.
Also you can use AlternateView functionality, it's more simple:
MailMessage mailMessage = new MailMessage("me#me.com"
,"me#me.com"
,"test"
,"");
string ContentId = "wecandoit.jpg";
mailMessage.Body = "<img src=\"cid:" + ContentId + "\"/>";
AlternateView av = AlternateView.CreateAlternateViewFromString(mailMessage.Body
,null
,MediaTypeNames.Text.Html);
LinkedResource lr = new LinkedResource(#"d:\Personal\My Pictures\wecandoit.jpg");
lr.ContentId = ContentId;
lr.ContentType.Name = ContentId;
lr.ContentType.MediaType = "image/jpeg";
av.LinkedResources.Add(lr);
mailMessage.AlternateViews.Add(av);
SmtpClient cl = new SmtpClient();
cl.PickupDirectoryLocation = #"c:\test";
cl.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory;
cl.Send(mailMessage);
(jdecuyper -- thanks for the plug, as I wrote aspNetEmail).
You can do this with aspNetEmail. You can replace the entire contents of the email message with your MHT.
You can't do this with System.Net.Mail, but if you want to go the commerical route, pop me an email at dave#advancedintellect.com and I'll show you how this can be done.
If you want to go an open source route, there is probably some SMTP code on codeproject that you could modify to do this. Basically, you would inject your contents into the DATA command of the SMTP process.
One thing to note: If your MHT document has embedded scripts, flash, activeX objects or anything that may be blocked by the mail client, it probably won't render the same as what you are seeing in the browser.
Are you trying to add some images to an html email?
To accomplish this you will need to embed the images inside your email. I found a tutorial to accomplish it in a few lines of code. You can also buy the aspnetemail assembly. It has always helped me a lot to send emails with embedded images, they also have an excellent support team if anything goes wrong.
Keep in mind that embedding images makes your email heavier, but nicer :)
It is possible via CDO.Message (it is necessary add to project references COM library "Microsoft CDO for Windows 2000 Library"):
protected bool SendEmail(string emailFrom, string emailTo, string subject, string MHTmessage)
{
string smtpAddress = "smtp.email.com";
try
{
CDO.Message oMessage = new CDO.Message();
// set message
ADODB.Stream oStream = new ADODB.Stream();
oStream.Charset = "ascii";
oStream.Open();
oStream.WriteText(MHTmessage);
oMessage.DataSource.OpenObject(oStream, "_Stream");
// set configuration
ADODB.Fields oFields = oMessage.Configuration.Fields;
oFields("http://schemas.microsoft.com/cdo/configuration/sendusing").Value = CDO.CdoSendUsing.cdoSendUsingPort;
oFields("http://schemas.microsoft.com/cdo/configuration/smtpserver").Value = smtpAddress;
oFields.Update();
// set other values
oMessage.MimeFormatted = true;
oMessage.Subject = subject;
oMessage.Sender = emailFrom;
oMessage.To = emailTo;
oMessage.Send();
}
catch (Exception ex)
{
// something wrong
}
}
It is possible via CDO.Message (it is necessary add to project references COM library "Microsoft CDO for Windows 2000 Library"):
protected bool SendEmail(string emailFrom, string emailTo, string subject, string MHTmessage)
{
string smtpAddress = "smtp.email.com";
try
{
CDO.Message oMessage = new CDO.Message();
// set message
ADODB.Stream oStream = new ADODB.Stream();
oStream.Charset = "ascii";
oStream.Open();
oStream.WriteText(MHTmessage);
oMessage.DataSource.OpenObject(oStream, "_Stream");
// set configuration
ADODB.Fields oFields = oMessage.Configuration.Fields;
oFields("http://schemas.microsoft.com/cdo/configuration/sendusing").Value = CDO.CdoSendUsing.cdoSendUsingPort;
oFields("http://schemas.microsoft.com/cdo/configuration/smtpserver").Value = smtpAddress;
oFields.Update();
// set other values
oMessage.MimeFormatted = true;
oMessage.Subject = subject;
oMessage.Sender = emailFrom;
oMessage.To = emailTo;
oMessage.Send();
}
catch (Exception ex)
{
// something wrong
}
}
I have a script that sends an e-mail as both plain text and HTML, and it works fine for most e-mail readers including Outlook and Gmail. However, when reading the message on a Windows Mobile smartphone, the output is:
PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDMuMiBGaW5hbC8vRU4i Pg0KPEhUTUw+DQo8SEVBRD4NCiAgICA8TUVUQSBIVFRQLUVRVUlWPSJDb250ZW50LVR5cGUi IENPTlRFTlQ9InRleHQvaHRtbDtjaGFyc2V0PWlzby04ODU5LTEiPg0KICAgIDxUSVRMRT5Z b3VyIE1lZ2Fwb255IFBhc3N3b3JkIC0gTWVnYXBvbnkgLSBEaXNjb3ZlciB0aGUgbmV4dCBi aWcgdGhpbmc8L1RJVExFPg0KICAgIDxTVFlMRSBUWVBFPSJ0ZXh0L2NzcyI+DQogICAgICAg IGE6bGluaywgYTp2aXNpdGVkDQogICAgICAgIHsNCiAgICAgICAgICAgIHRleHQtZGVjb3Jh dGlvbjogdW5kZXJsaW5lOw0KICAgICAgICAgICAgY29sb3I6ICM5MDA7DQogICAgICAgIH0N CiAgICAgICAgYTpob3Zlcg0KICAgICAgICB7DQogICAgICAgICAgICB0ZXh0LWRlY29yYXRp b246IG5vbmU7DQogICAgICAgICAgICBjb2xvcjogIzAwMDsNCiAgICAgICAgfQ0KICAgIDwv U1RZTEU+DQo8L0hFQUQ+DQo8Qk9EWT4NCiAgICA8QSBIUkVGPSJodHRwOi8vd3d3Lm1lZ2Fw b255LmNvbS8iIFRJVExFPSJNZWdhcG9ueSAtIERpc2NvdmVyIHRoZSBuZXh0IGJpZyB0aGlu ZyI+DQogICAgICAgIDxJTUcgU1JDPSJodHRwOi8vd3d3Lm1lZ2Fwb255LmNvbS9faW1nL21l Z2Fwb255LWhlYWRlci1yZWQuZ2lmIiBXSURUSD0iNjMwIiBIRUlHSFQ9Ijg4IiBBTFQ9Ik1l Z2Fwb255IC0gRGlzY292ZXIgdGhlIG5leHQgYmlnIHRoaW5nIg0KICAgICAgICAgICAgQk9S REVSPSIwIj48L0E+DQogICAgPEZPTlQgU0laRT0iNCIgRkFDRT0iQXJpYWwiPg0KICAgIDxC Uj4NCiAgICA8QlI+DQogICAgWW91ciBNZWdhcG9ueSBwYXNzd29yZCBpczoNCiAgICAgICAg PEJSPg0KICAgICAgICA8QlI+DQogICAgICAgIEt1YnkyNDI0DQogICAgICAgIDxCUj4NCiAg ICAgICAgPEJSPg0KICAgICAgICBHbyB0byANCiAgICA8L0ZPTlQ+DQogICAgPEEgSFJFRj0i aHR0cDovL3d3dy5tZWdhcG9ueS5jb20vIiBUSVRMRT0iTWVnYXBvbnkgLSBEaXNjb3ZlciB0 aGUgbmV4dCBiaWcgdGhpbmciPg0KICAgICAgICA8Rk9OVCBTSVpFPSI0IiBGQUNFPSJBcmlh bCIgQ09MT1I9IiM5OTAwMDAiPk1lZ2Fwb255LmNvbTwvRk9OVD48L0E+DQogICAgICAgIDxG T05UIFNJWkU9IjQiIEZBQ0U9IkFyaWFsIj4NCiAgICAgICAgICAgIHRvIGFjY2VzcyB5b3Vy IGFjY291bnQuDQogICAgICAgICAgICA8QlI+DQogICAgICAgICAgICA8QlI+DQogICAgICAg ICAgICBUaGFuayB5b3UgZm9yIHlvdXIgc3VwcG9ydCBvZiBNZWdhcG9ueSBhbmQgaW5kZXBl bmRlbnQgbXVzaWMhPEJSPg0KICAgICAgICAgICAgPEJSPg0KICAgICAgICAgICAgU2luY2Vy ZWx5LDxCUj4NCiAgICAgICAgICAgIDxCUj4NCiAgICAgICAgICAgIFRoZSBNZWdhcG9ueSBU ZWFtPEJSPg0KICAgICAgICAgICAgPEJSPg0KICAgICAgICAgICAgPEJSPg0KICAgICAgICA8 L0ZPTlQ+PEZPTlQgU0laRT0iMiIgRkFDRT0iQXJpYWwiPipUaGlzIGlzIGFuIGF1dG9tYXRl ZCBtZXNzYWdlLiBQbGVhc2UgZG8gbm90IHJlcGx5LjwvRk9OVD4NCjwvQk9EWT4NCjwvSFRN TD4NCg==
The correct output should be: Click here to see
The code is:
SmtpClient mC = new SmtpClient(ConfigurationManager.AppSettings["smtpServer"]);
NetworkCredential nC = new NetworkCredential(ConfigurationManager.AppSettings["smtpUsername"], ConfigurationManager.AppSettings["smtpPassword"]);
mC.UseDefaultCredentials = false;
mC.Credentials = nC;
MailAddress mFrom = new MailAddress("noreply#megapony.com", "Megapony");
MailAddress mTo = new MailAddress(forgotpwemail.Text);
MailMessage mMsg = new MailMessage(mFrom, mTo);
mMsg.IsBodyHtml = false;
mMsg.Subject = "Your Megapony Password";
mMsg.Body = getForgotPWBodyPlain(result);
System.Net.Mime.ContentType mimeType = new System.Net.Mime.ContentType("text/html");
AlternateView alternate = AlternateView.CreateAlternateViewFromString(getForgotPWBody(result), mimeType);
mMsg.AlternateViews.Add(alternate);
try
{
mC.Send(mMsg);
pnlpwform.Visible = false;
pnlSuccess.Visible = true;
}
catch (Exception)
{
pnlResponse.Visible = true;
}
mMsg.Dispose();
Please help!
Thanks,
Paul
I would say it's a combination of the content-type and the the image that's causing the issue. The link you provided showed a nice gif with a Megapony logo, yet the content-type is set to text only. Because of this, the bits that make up the gif is being treated as a series of text characters.
This would be a good place to start: http://www.systemnetmail.com/faq/3.1.3.aspx