My app sends an email (see code snippet below) but I want to check first if the SMTP server is running in IIS7.
mySMTPClient.Host = "localhost"
mySMTPClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network
mySMTPClient.Send(myMail)
results.Dispose()
I'm using the TcpClient and TcpListener classes to read/write to the network when a request comes in on port 25. All I'm trying to do at the moment is make it so that my server program can receive SMTP messages from other SMTP servers. I've tested in Telnet - if I connect to my own IP on port 25 and type EHLO, MAIL FROM, RCPT TO, DATA etc then all works as it should and the details I entered are logged by the program (it doesnt do anything about delivering these details/email yet).all looks good... but then when I try and just send an email to my domain from my work account I can see that a connection is made to my program and the string "EHLO workdomain.com " is received by my program - my program responds to the remote SMTP server with "250-mydomain.com Hello" and then a CrLF and then "250-OK". After that point however, my app does not receive anything further at all from the server at work. I'm guessing I am doing something wrong with the data I'm returning when it sends EHLO but can anyone point me in the correct direction?
I was using telnet to test with, it seems that I have made it work only with telnet.In telnet each time I type a key the data is passed to the server, however with a real SMTP server it just sends each entire command in one go. So after altering my server a little I can now get it to respond with the 250-OK which I thought it already was doing.. but it still doesnt work. The remote server just sends EHLO and then thats it nothing more.Something interesting, at the moment I am ending all of my responses to the remote server with VbLf - if I change this to VbCrLf (which is what I believe it is meant to be according to the SMTP standard) then I get an infinite amount of empty strings sent to my program (or perhaps some other character that just shows as an empty string in intellisense when stepping through the code). Changing it back to just vbLf or ControlChars.Lf makes it go back to just sending EHLO and then nothing else..
I'm running into an issue with my application. If the laptop is just turned on and a user opens the application, the application attempts to hit a SQL server to do some work. The issue is that sometimes the SQL Server process hasn't started yet (slow laptop).
What is the preferred method for checking if this is running.
Do I check for it like a normal process?
Do I attempt to make a connection via ADO.NET and catch the error?
How would i check a game server is running?
View 2 Repliesi'm tying to send email in my application directly by the smtp server but the server doesn't allow me to do that.The application its used by everyone in the company, so i set the smtp client UseDefaultCredentials to True, but the server replies with this when i try to send an email:[code].....If i set the credentials by hand, the server sends the email. So my problem is how to make this work to everyone? I don't want to have one public/friend var all time in the application with the credentials of the current user?
View 9 RepliesThis emailing code wont seem to work in my program. I get an exception "The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.5.1 authentication required."
Imports System.Net.Mail
Public Class emailStudent
Private Sub sendEmailButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles sendEmailButton.Click
SendMail()
[code]....
I need to develop an application that can read the undeliverable mails and make an entry into the database about all these mails. i m using following code to get mails from server
[Code]...
I cant find any good example of vb.net checking if email is valid, as example "something@yahoo.com"
View 4 RepliesI'm trying to create an application that sends an email to an smtp-server. The server is not set fixed, but will be looked up according to the domainpart of the email-address where the email should be sent to.
[Code]...
It would be quite useful, to know if the message was accepted by the mailserver and the message was successfully sent. What I am able so far is, that I can get the SMTP-Server error code (if there was an error (StatusCode 5xx) by using the System.Net.Mail.SMTPClient Object and its SendAsync Function. There, if there was an error, I get an Exception-Object in the Callback-Event of the SMTPClient
I'm well aware that not every mailserver will tell me if the mailaccount truly exists and then reject my mail with an errorcode but instead just accept the message and then delete it. Therefore I would be grateful for another Method to check if the mail was sent (note: not read, that would be the read confirmation)
The final purpose would be: Try to send an email to a recipient using it's domains mailserver and if it fails, proceed according to the errorcode (user does not exist -> abort / mailserver did not respond -> use another mailserver if available).
Is it possible to only change the SMTP adress with VB.Net ???
I searched but no answer..Maybe with VBscript...(another forum)
Here is my code
Dim message As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
message.To.Add("from textbox field")
message.Subject = "Testing"
[Code].....
I need to encrypt my SMTP server password in my application. It is not located in a textbox on a form, but rather directly in the code.
View 4 RepliesI'm trying to make an e-mailer that connects to an SMTP server.
Ive looked everywhere and Id prefer if it was explained how to put it into my code.
[code...]
below is my code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
ProgressBar1.Value = 5
Dim strTo As String = setting.tosett.ToString[code].....
i want the program to ping the server before sending the mail; if server is available then send mail if not then message box with warning appears notifying user to check VPN connection and sending of mail is canceled.
Apparently these two thing don't really have anything to do with eachother.Is there a way to send EMails anonymously through an SMTP Server?
View 8 RepliesI have a VB.net Application running on the server which will be sending emails close to 200 everyday. Following is my coding:
Dim objNewMail = CreateObject("CDO.Message")
objNewMail.Configuration.Fields.Item("[URL]") = 2
objNewMail.Configuration.Fields.Item("[URL]") = "localhost"
objNewMail.Configuration.Fields.Item("[URL]") = 25
objNewMail.Configuration.Fields.Update()
objNewMail.From = mailFrom
objNewMail.To = mailTO
[Code] .....
The above codes runs inside a loop. The above code runs quite well without any issues. But once or twice a month, I get the following error message and application stops.
System.Runtime.InteropServices.COMException (0x80040213): The transport failed to connect to the server.
I am using following code to send email through smtp server, I have tested this code on my machine and its working fine but after deploying the project on server 2003, exe file runs okay but i am not receiving any emails?
'create the mail message
Dim mail As New MailMessage()
Dim smtp As New SmtpClient("smtp.server.europe.com")[code].......
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim mail As New MailMessage
[Code]....
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required
i am working on a my project, which send email to me using gmail.smtp, it works fine on xp, vista, and + some of windows 7 versions, in few pc's i had tried that, and got a issue.here is detail of error i got in there, i am using visual studio 2008 & a internet with proxy server,n my openion its a problem with internet ? maybe ? because when i had used this on my dsl connection it worked.
View 7 RepliesSo I'm making a Program to Start/Restart/Stop and running commands from the Console for my Server.Now when someone uses the console, I want to be alerted of it on my Mail.I am using Visual Studio 2010.
[Code]...
I'm trying to write my own SMTP server at the moment so that people can use it in their applications to send and receive emails.I am having a few problems at the moment with the TcpListener side of things though. Basically I do not want to start the TcpListener in the constructor of my class because people could be using this SMTP Server class just to send emails and might not care about receiving them. In fact the majority of people that use it will probably use it for that reason, to send and not to receive.
So I am now considering breaking this into 2 totally separate projects that have no dependencies on each other, but could easily be used in the same application if required. The reason I designed this with both 'features' in the same project in the first place was because that is how an SMTP server works - it can receive incoming SMTP requests and it can send SMTP server requests to other servers (and in some cases, receiving an SMTP request would cause it to send an SMTP command to another server)
I have taken an interest in creating a SMTP server in vb.net that has the ability to hide ip addresses in email headers.I see that some people claim that it's possible around on the internet, but I haven't seen any direct source code to create an anonymous smtp server in visual basic 2008.Now I know that it's legal to send emails via a masked ip address and I believe that it's also fair since some people believe in anonymity, but I am in all means against spammers.
View 2 RepliesI am trying to get this program to send an email, but still no luck. I am getting the following error that I do not understand. I do not understand what I am doing wrong. Also, I may have an issue that the computer I am writing this code on and trying to send the message does not have ISS and is just windows XP home.
The error is below
System.Net.Mail.SmtpException was unhandled
Message="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. k41sm2133530rvb.6"
[code].....
I am looking to make a SMTP (Port 25) listener to listen in and accept incoming mail, look at the message source, make changes if needed, and retransmit the message out another port. This iwll make it act like a sort-of intermediary service.how one would write a port listener in VB.net, that could listen in on the port, and display the message in a text box (the whole source, headers and all, since that's what the mail comes in as anyway).
View 3 RepliesIs it possible to make a program similar to outlook express where I can send/receive emails , I already made one sending emails but I need to receive emails too
View 2 RepliesEdit by Moderator: Split from this thread[code]...
View 4 RepliesI am working on a tool that will better manage the server applications I run on my server. I have a working version of what I need written in VB6, I've tried converting the code from vb6 to .net with no luck. Basically I have a few server applications I would like to display the status of, if they're running or not. Then with a few buttons to start/stop the application accordingly. I've found a few different code snippets across the web which I've tried to implement in to my project with no luck.
View 5 RepliesI have an application that provides core services for a series of other applications.When another of these applications is started, I want to check that the service application is running and if not shutdown.What is the best method to check for the existence of the other app? I'm thinking that I should be using a global mutex in the services app and checking for it's existence in the other apps. Is this the correct way to proceed?
View 4 RepliesI am trying to check for certain processes that is running and then inform the user of those processes via textbox like "The programs; -name of the processes running goes here- are running". [code]
View 2 RepliesAlthough I signed up a year ago I didnt have enough free time to carry on programming, but have now made some time.
I have spent the past 2 hours trying to look for a code for visual basic 2008 that will check if a program is running.
It would be really helpful if someone wrote the whole code out and made it clear exactly where I put them name of the .exe file
