C# - Finding Information About Sending Emails In A Background Thread?
Jan 21, 2010
I have a thread running in the background that will sleep and pull data from the database when something wakes it up. I am sending the emails using google apps using SmtpClient (code below).
I wanted to know if there is anything i be aware of? I plan to send only one email at a time (a registration or forgot password email). I am a little worried something can happen like an invalid email locking up the thread because i didnt set a timeout or maybe google apps happen to be done and causing the app to blow up. What should i be aware off? I should ask how i should test as well?
I have a requirement like sending multiple mails for each update in database.But if i write mail sending code on button click then it will delay the page load time till all mails are send.Is there any way to send mails using seperate thread that runs at backend or maintain a queue.
One more think content of all mails are not same always.
I have a customer database of 100,00,000 records stored in a sql db.I need to send mass emails to those customers everyday at a particular time.I want to use thread pool to achive it.
I need an explanation regarding some advice I got on this site. I'm doing a newsletter sending app, and I have my mail sent in a seperate thread so the process doesn't slow down the whole web site. A couple of people advised me to set the threads IsBackground property to true. I did this, but was also courious about what this does, so I googled a bit.
As it turns out, setting the IsBackground property to true indicates that "it's okay if the process shuts down while this thread is still running.". Or as microsoft puts it "Any remaining background threads are stopped and do not complete." I don't know if I got this the wrong way but, wouldn't it be better to leave the IsBackground property to false, so that the spawned thread can complete its work regarding the main thread?
My code sends email via asp.net mail namespace. Basically I generate HTML code which carries an image tag referring to an image on server. It uses absolute path and then the html email is sent to recipients.
Now when they receive emails on gmail and other clients, it wouldnt display images and not that images are broken but it wouldnt get displayed. Gmail is an issue wherein it prompts of non-https message and then display link on top. I know how to get around but my recipients have no clue on this technical things. so they end up not seeing the images.
How can I resolve this issue? How can I ensure that they always receive images irrespective of their internet settings?
Bit of a long shot, but is there a way in ASP.NET to dynamically get the website's URL [URL] when there is no HttpContext.Current available.
There is no HttpContext because the code is running in a background thread* (but under the ASP.NET AppDomain). I have a background process that sends emails out every evening, and needs to include the Web address, but I don't want to hard code it because of deployments and testing (it changes from [URL] to[URL] and then to [URL] for the live site).
I was reading Walkthrough: Creating an Asynchronous HTTP Handler and noticed they pass the HttpContext from the handler thread and use it in a WaitCallback which runs on a background thread. It makes calls like _context.Response.Write(). Am I correct in assuming that this doesn't violate the fact that HttpContext is not thread safe because the handler thread will not be using it after the async work has started?
Also, Using an HTTPContext across threads has some good information about HttpContext and threads. Is all of HttpContext not thread safe, or just items like Response? Can multiple background threads access the Items property, if only in read mode?
Here is my situation and hopefully someone could guide me in the right direction.I have a shared or static class in my website (App_Code folder) which has static methods to send emails asychronoulsy. So whenever there is an exception in any of my pages or classes I call these methods to send an email to support asynchronously. Now when there is an exception in a page, to route that exception asynchronously I need to have Async = "true" for that page. I have more than 50 pages and I don't want to set Async= "true" on every page as I read that it affects performance.So I was wondering if there is any way I could send emails asynchronously without having to set async = "true" on every page.
I'm having an issue sending large volumes of emails out from an ASP.Net application. I won't post the code, but instead explain what's going on. The code should send emails to 4000 recipients but seems to stall at 385/387.
The code creates the content for the email in a string.
It then selects a list of email address to send to.
Looping through the data via a datareader it picks out the email address and sends an email.
The email sending is done by a separate method which can handle failures and returns it's outcome.
As each record is sent I produce an XML node in an XML document to log each specific attempt to send.
The loop seems to end prematurely and the XML document is saved to disk.
Now I know the code works. I have run it locally using the same SMTP machine and it worked fine with 500 records. Granted there was less content, but I can't see how that would make any difference.
I don't think the page itself times out, but even if it did, I was sure .Net would continue processing the page, even if the user saw a page time out error.
Is there any samples on how to use ASP.NET built-in templates out of the page, just for rendering text with params. For instance, to build email message.
I am using the ASP.NET membership provider controls (ChangePassword and PasswordRecovery) and they generally work just fine. Unfortunately they don't send any emails once the process is finished. I set up the SMTP server using the ASP.NET Configuration Website and it added the following lines to the web.config:
I also tried using the IP adress of the server instead of the domain. In addition to that I set the maildefinition properties on the used web controls:
<MailDefinition From="maildaemon@pagetailors.de" Subject="Your new password"> </MailDefinition>
Once I finish changing or resetting the password, the controls shows the success message. It does not show any errors but the mails are not sent. I also checked the SMTP log files on the server (it's a MailEnable server) but couldn't even find an attempt to send these messages. I am using a custom email helper class which manually sends an email using the following settings:
public static void SendEmail(string from, string to, string subject, string body) { SmtpClient mailClient = new SmtpClient(ConfigReader.GetStringValue("MailServer")); mailClient.Credentials = new NetworkCredential(ConfigReader.GetStringValue("MailUsername"), ConfigReader.GetStringValue("MailPassword")); MailMessage mailMessage = new MailMessage(from, to, subject, body); mailClient.Send(mailMessage); }
The values for mailserver, username and password read from the config file are the same as defined in the ASP.NET configuration tool. These mails are delivered successfully.
I am writing an application that will need to send a massive amount of emails to our students who will be selected from our database (each email will be personalized to the extent that will include their name, course of study etc...so needs to be sent one at a time).
I could do this looping over an SmtpClient, but I'm afraid that with the numbers I'm trying to send, I'll ultimately run into timeout issues or my thread being killed because of lack of machine resources. if looping over SmtpClient is an ok solution, how I should go about handling it to prevent what I posted above.
i am developing a project wich sends massive amounts of emails. Lets say 200-300 emails per query. And each user can conduct multiple search querys. So at times it gets relly great number of emails to send.So this is what i need:1. a webservice with a fireAndForget type method, that i can pass in single or multiple email messages
I want to send multiple emails with high speed. I am sending a newsletter on daily basis to around 4000 contact-IDs. I developed VB.net code for sending emails through THREADS. My threads are sending Emails to my contacts. But the problem is the speed is slow. I wanted to send emails with high speed and with less email bounce ration.
I need to send an email in asp.net but I need sender appears like "MySiteName" without info@[URL] need to send an email in asp.net but I need sender appears like "MySiteName" without info@[URL]
in my application when client completes its shopping email will goes to user this works fine when there is internet connection is working fine, if there is some problem in internet connection if one mail stops then all the mails will be stopped even now internet works fine,
how to resend the emails using smtp server, is there any option to resend the emails automatically when internet works fine.
I use a Smtp Client to email submitted information from an asp.net form. 3 users sent in their information and the user on the other end did not recieve either one of the emails. On the 2nd time around, she did recieve the emails. What could it be?
public void mail() { System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage(); System.Net.Mail.SmtpClient smtpClient = new SmtpClient(); //create the mail message //set the addresses mail.From = new MailAddress("kamalakkanavar@gmail.com"); mail.To.Add(TextBox1.Text);
I am trying to use ThreadPool.QueueUserWorkItem to send daily newsletter to my website subscribed members (about 500 members) at 2:00 am every day automatically.I placed record on txt file everytime send out email for debuging, then I found that only about 165 members been send out. every day is different number but just about.never finished whole 500 members.looks like thread aborted before finish sent out all emails.anybody knows what's going on here?I am using shared hosting, so I couldn't run my own window service for this.
