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Email Socket QuestionI am learning vb.net and trying to create a simple program to watch
port 25 and receive email. I do not need any advanced features. I just need to connect, watch and grab the emails as they come. This seems like it should be a pretty simple but I can not seem to find any examples in vb.net 8. Any help is appreciated. TIA Well you may not need any advanced features, but you, at least, need the
basic features of an SMTP server. I get the impression that you think an 'email' arriving at an SMTP is just a stream of data, but it is not. An SMTP server and a client that is sending it an 'email' carry out a complex conversation. As you are learning VB.NET I suggest that you avoid such a project until you have read and are able to implement all of the core functionality as set out in the SMTP and related RFC's. <googlegro***@theindianmaiden.com> wrote in message Show quoteHide quote news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >I am learning vb.net and trying to create a simple program to watch > port 25 and receive email. I do not need any advanced features. I > just need to connect, watch and grab the emails as they come. This > seems like it should be a pretty simple but I can not seem to find any > examples in vb.net 8. Any help is appreciated. TIA > I am hoping to find someone who has already written the "complex
conversation" code and to study it. Any help is appreciated. Stephany Young wrote: Show quoteHide quote > Well you may not need any advanced features, but you, at least, need the > basic features of an SMTP server. > > I get the impression that you think an 'email' arriving at an SMTP is just a > stream of data, but it is not. > > An SMTP server and a client that is sending it an 'email' carry out a > complex conversation. > > As you are learning VB.NET I suggest that you avoid such a project until you > have read and are able to implement all of the core functionality as set out > in the SMTP and related RFC's. > > > <googlegro***@theindianmaiden.com> wrote in message > news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... > >I am learning vb.net and trying to create a simple program to watch > > port 25 and receive email. I do not need any advanced features. I > > just need to connect, watch and grab the emails as they come. This > > seems like it should be a pretty simple but I can not seem to find any > > examples in vb.net 8. Any help is appreciated. TIA > > Those that have, sell their products for (in some cases) several thousand
dollars. They generally do not make the source code available. Show quoteHide quote "iMaiden" <googlegro***@theindianmaiden.com> wrote in message news:1164932082.913991.251940@f1g2000cwa.googlegroups.com... >I am hoping to find someone who has already written the "complex > conversation" code and to study it. Any help is appreciated. > > > Stephany Young wrote: >> Well you may not need any advanced features, but you, at least, need the >> basic features of an SMTP server. >> >> I get the impression that you think an 'email' arriving at an SMTP is >> just a >> stream of data, but it is not. >> >> An SMTP server and a client that is sending it an 'email' carry out a >> complex conversation. >> >> As you are learning VB.NET I suggest that you avoid such a project until >> you >> have read and are able to implement all of the core functionality as set >> out >> in the SMTP and related RFC's. >> >> >> <googlegro***@theindianmaiden.com> wrote in message >> news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >> >I am learning vb.net and trying to create a simple program to watch >> > port 25 and receive email. I do not need any advanced features. I >> > just need to connect, watch and grab the emails as they come. This >> > seems like it should be a pretty simple but I can not seem to find any >> > examples in vb.net 8. Any help is appreciated. TIA >> > > I'm not here for a discussion and if you don't know how to do what I am
trying to do that is fine but perhaps you do or someone else in this group does so here goes. How would I use sockets to 1) open port 25 2) receive data from this port 3) send data through this port 4) close the port. Stephany Young wrote: Show quoteHide quote > Those that have, sell their products for (in some cases) several thousand > dollars. They generally do not make the source code available. > > > "iMaiden" <googlegro***@theindianmaiden.com> wrote in message > news:1164932082.913991.251940@f1g2000cwa.googlegroups.com... > >I am hoping to find someone who has already written the "complex > > conversation" code and to study it. Any help is appreciated. > > > > > > Stephany Young wrote: > >> Well you may not need any advanced features, but you, at least, need the > >> basic features of an SMTP server. > >> > >> I get the impression that you think an 'email' arriving at an SMTP is > >> just a > >> stream of data, but it is not. > >> > >> An SMTP server and a client that is sending it an 'email' carry out a > >> complex conversation. > >> > >> As you are learning VB.NET I suggest that you avoid such a project until > >> you > >> have read and are able to implement all of the core functionality as set > >> out > >> in the SMTP and related RFC's. > >> > >> > >> <googlegro***@theindianmaiden.com> wrote in message > >> news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... > >> >I am learning vb.net and trying to create a simple program to watch > >> > port 25 and receive email. I do not need any advanced features. I > >> > just need to connect, watch and grab the emails as they come. This > >> > seems like it should be a pretty simple but I can not seem to find any > >> > examples in vb.net 8. Any help is appreciated. TIA > >> > > > iMaiden (and I'm not sure you are one) if you're not here for discussion
(of programming topics), then you're really in the wrong place. I'm more new than not, and I've gotten a lot of help from the people here - sometimes they surprise me with code, most of the time I get suggestions about where to go look. That's better for me since I have the opportunity to see how to use the tools I have at hand rather than having someone hand it to me on a silver platter. If you need it so badly that you can't be polite (and 'I'm not here for discussion...' is *not* polite) then maybe you'd better take Stephanies inferred suggestion and go buy one .... .... and, no, I don't know how to do what you want either; but I do know that your approach isn't the way *I'd* handle it. //al On 30 Nov 2006 17:08:55 -0800, iMaiden wrote: Show quoteHide quote > I'm not here for a discussion and if you don't know how to do what I am > trying to do that is fine but perhaps you do or someone else in this > group does so here goes. How would I use sockets to > > 1) open port 25 > 2) receive data from this port > 3) send data through this port > 4) close the port. > > Stephany Young wrote: >> Those that have, sell their products for (in some cases) several thousand >> dollars. They generally do not make the source code available. >> >> >> "iMaiden" <googlegro***@theindianmaiden.com> wrote in message >> news:1164932082.913991.251940@f1g2000cwa.googlegroups.com... >>>I am hoping to find someone who has already written the "complex >>> conversation" code and to study it. Any help is appreciated. >>> >>> >>> Stephany Young wrote: >>>> Well you may not need any advanced features, but you, at least, need the >>>> basic features of an SMTP server. >>>> >>>> I get the impression that you think an 'email' arriving at an SMTP is >>>> just a >>>> stream of data, but it is not. >>>> >>>> An SMTP server and a client that is sending it an 'email' carry out a >>>> complex conversation. >>>> >>>> As you are learning VB.NET I suggest that you avoid such a project until >>>> you >>>> have read and are able to implement all of the core functionality as set >>>> out >>>> in the SMTP and related RFC's. >>>> >>>> >>>> <googlegro***@theindianmaiden.com> wrote in message >>>> news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >>>> >I am learning vb.net and trying to create a simple program to watch >>>> > port 25 and receive email. I do not need any advanced features. I >>>> > just need to connect, watch and grab the emails as they come. This >>>> > seems like it should be a pretty simple but I can not seem to find any >>>> > examples in vb.net 8. Any help is appreciated. TIA >>>> > >>> Al,
A big mistake in your message, you will be punished for many years. It is Stephany, not Stephanie. :-)))) CorShow quoteHide quote "al jones" <alfredmjo***@shotmail.com> schreef in bericht news:r0k091c2l29i.1w7g6oo8z8chs$.dlg@40tude.net... > iMaiden (and I'm not sure you are one) if you're not here for discussion > (of programming topics), then you're really in the wrong place. I'm more > new than not, and I've gotten a lot of help from the people here - > sometimes they surprise me with code, most of the time I get suggestions > about where to go look. That's better for me since I have the opportunity > to see how to use the tools I have at hand rather than having someone hand > it to me on a silver platter. > > If you need it so badly that you can't be polite (and 'I'm not here for > discussion...' is *not* polite) then maybe you'd better take Stephanies > inferred suggestion and go buy one .... > > ... and, no, I don't know how to do what you want either; but I do know > that your approach isn't the way *I'd* handle it. > > //al > > On 30 Nov 2006 17:08:55 -0800, iMaiden wrote: > >> I'm not here for a discussion and if you don't know how to do what I am >> trying to do that is fine but perhaps you do or someone else in this >> group does so here goes. How would I use sockets to >> >> 1) open port 25 >> 2) receive data from this port >> 3) send data through this port >> 4) close the port. >> >> Stephany Young wrote: >>> Those that have, sell their products for (in some cases) several >>> thousand >>> dollars. They generally do not make the source code available. >>> >>> >>> "iMaiden" <googlegro***@theindianmaiden.com> wrote in message >>> news:1164932082.913991.251940@f1g2000cwa.googlegroups.com... >>>>I am hoping to find someone who has already written the "complex >>>> conversation" code and to study it. Any help is appreciated. >>>> >>>> >>>> Stephany Young wrote: >>>>> Well you may not need any advanced features, but you, at least, need >>>>> the >>>>> basic features of an SMTP server. >>>>> >>>>> I get the impression that you think an 'email' arriving at an SMTP is >>>>> just a >>>>> stream of data, but it is not. >>>>> >>>>> An SMTP server and a client that is sending it an 'email' carry out a >>>>> complex conversation. >>>>> >>>>> As you are learning VB.NET I suggest that you avoid such a project >>>>> until >>>>> you >>>>> have read and are able to implement all of the core functionality as >>>>> set >>>>> out >>>>> in the SMTP and related RFC's. >>>>> >>>>> >>>>> <googlegro***@theindianmaiden.com> wrote in message >>>>> news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >>>>> >I am learning vb.net and trying to create a simple program to watch >>>>> > port 25 and receive email. I do not need any advanced features. I >>>>> > just need to connect, watch and grab the emails as they come. This >>>>> > seems like it should be a pretty simple but I can not seem to find >>>>> > any >>>>> > examples in vb.net 8. Any help is appreciated. TIA >>>>> > >>>> Thank you Cor. I was wondering how long it would take someone to spot that.
But really, I'm a big girl and I can spit my dummy quite well without any help. ;) Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:uESvL9QFHHA.2296@TK2MSFTNGP04.phx.gbl... > Al, > > A big mistake in your message, you will be punished for many years. > > It is Stephany, not Stephanie. > > :-)))) > > Cor > > "al jones" <alfredmjo***@shotmail.com> schreef in bericht > news:r0k091c2l29i.1w7g6oo8z8chs$.dlg@40tude.net... >> iMaiden (and I'm not sure you are one) if you're not here for discussion >> (of programming topics), then you're really in the wrong place. I'm more >> new than not, and I've gotten a lot of help from the people here - >> sometimes they surprise me with code, most of the time I get suggestions >> about where to go look. That's better for me since I have the >> opportunity >> to see how to use the tools I have at hand rather than having someone >> hand >> it to me on a silver platter. >> >> If you need it so badly that you can't be polite (and 'I'm not here for >> discussion...' is *not* polite) then maybe you'd better take Stephanies >> inferred suggestion and go buy one .... >> >> ... and, no, I don't know how to do what you want either; but I do know >> that your approach isn't the way *I'd* handle it. >> >> //al >> >> On 30 Nov 2006 17:08:55 -0800, iMaiden wrote: >> >>> I'm not here for a discussion and if you don't know how to do what I am >>> trying to do that is fine but perhaps you do or someone else in this >>> group does so here goes. How would I use sockets to >>> >>> 1) open port 25 >>> 2) receive data from this port >>> 3) send data through this port >>> 4) close the port. >>> >>> Stephany Young wrote: >>>> Those that have, sell their products for (in some cases) several >>>> thousand >>>> dollars. They generally do not make the source code available. >>>> >>>> >>>> "iMaiden" <googlegro***@theindianmaiden.com> wrote in message >>>> news:1164932082.913991.251940@f1g2000cwa.googlegroups.com... >>>>>I am hoping to find someone who has already written the "complex >>>>> conversation" code and to study it. Any help is appreciated. >>>>> >>>>> >>>>> Stephany Young wrote: >>>>>> Well you may not need any advanced features, but you, at least, need >>>>>> the >>>>>> basic features of an SMTP server. >>>>>> >>>>>> I get the impression that you think an 'email' arriving at an SMTP is >>>>>> just a >>>>>> stream of data, but it is not. >>>>>> >>>>>> An SMTP server and a client that is sending it an 'email' carry out a >>>>>> complex conversation. >>>>>> >>>>>> As you are learning VB.NET I suggest that you avoid such a project >>>>>> until >>>>>> you >>>>>> have read and are able to implement all of the core functionality as >>>>>> set >>>>>> out >>>>>> in the SMTP and related RFC's. >>>>>> >>>>>> >>>>>> <googlegro***@theindianmaiden.com> wrote in message >>>>>> news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >>>>>> >I am learning vb.net and trying to create a simple program to watch >>>>>> > port 25 and receive email. I do not need any advanced features. I >>>>>> > just need to connect, watch and grab the emails as they come. >>>>>> > This >>>>>> > seems like it should be a pretty simple but I can not seem to find >>>>>> > any >>>>>> > examples in vb.net 8. Any help is appreciated. TIA >>>>>> > >>>>> > > OOps, < chuckle > sorry, Stephany - but at least I didn't get called on the
carpet for the message .... :) //al On Fri, 1 Dec 2006 19:16:44 +1300, Stephany Young wrote: Show quoteHide quote > Thank you Cor. I was wondering how long it would take someone to spot that. > > But really, I'm a big girl and I can spit my dummy quite well without any > help. > > ;) > > "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message > news:uESvL9QFHHA.2296@TK2MSFTNGP04.phx.gbl... >> Al, >> >> A big mistake in your message, you will be punished for many years. >> >> It is Stephany, not Stephanie. >> >> :-)))) >> >> Cor >> >> "al jones" <alfredmjo***@shotmail.com> schreef in bericht >> news:r0k091c2l29i.1w7g6oo8z8chs$.dlg@40tude.net... >>> iMaiden (and I'm not sure you are one) if you're not here for discussion >>> (of programming topics), then you're really in the wrong place. I'm more >>> new than not, and I've gotten a lot of help from the people here - >>> sometimes they surprise me with code, most of the time I get suggestions >>> about where to go look. That's better for me since I have the >>> opportunity >>> to see how to use the tools I have at hand rather than having someone >>> hand >>> it to me on a silver platter. >>> >>> If you need it so badly that you can't be polite (and 'I'm not here for >>> discussion...' is *not* polite) then maybe you'd better take Stephanies >>> inferred suggestion and go buy one .... >>> >>> ... and, no, I don't know how to do what you want either; but I do know >>> that your approach isn't the way *I'd* handle it. >>> >>> //al >>> >>> On 30 Nov 2006 17:08:55 -0800, iMaiden wrote: >>> >>>> I'm not here for a discussion and if you don't know how to do what I am >>>> trying to do that is fine but perhaps you do or someone else in this >>>> group does so here goes. How would I use sockets to >>>> >>>> 1) open port 25 >>>> 2) receive data from this port >>>> 3) send data through this port >>>> 4) close the port. >>>> >>>> Stephany Young wrote: >>>>> Those that have, sell their products for (in some cases) several >>>>> thousand >>>>> dollars. They generally do not make the source code available. >>>>> >>>>> >>>>> "iMaiden" <googlegro***@theindianmaiden.com> wrote in message >>>>> news:1164932082.913991.251940@f1g2000cwa.googlegroups.com... >>>>>>I am hoping to find someone who has already written the "complex >>>>>> conversation" code and to study it. Any help is appreciated. >>>>>> >>>>>> >>>>>> Stephany Young wrote: >>>>>>> Well you may not need any advanced features, but you, at least, need >>>>>>> the >>>>>>> basic features of an SMTP server. >>>>>>> >>>>>>> I get the impression that you think an 'email' arriving at an SMTP is >>>>>>> just a >>>>>>> stream of data, but it is not. >>>>>>> >>>>>>> An SMTP server and a client that is sending it an 'email' carry out a >>>>>>> complex conversation. >>>>>>> >>>>>>> As you are learning VB.NET I suggest that you avoid such a project >>>>>>> until >>>>>>> you >>>>>>> have read and are able to implement all of the core functionality as >>>>>>> set >>>>>>> out >>>>>>> in the SMTP and related RFC's. >>>>>>> >>>>>>> >>>>>>> <googlegro***@theindianmaiden.com> wrote in message >>>>>>> news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >>>>>>> >I am learning vb.net and trying to create a simple program to watch >>>>>>> > port 25 and receive email. I do not need any advanced features. I >>>>>>> > just need to connect, watch and grab the emails as they come. >>>>>>> > This >>>>>>> > seems like it should be a pretty simple but I can not seem to find >>>>>>> > any >>>>>>> > examples in vb.net 8. Any help is appreciated. TIA >>>>>>> > >>>>>> >> >> "iMaiden" <googlegro***@theindianmaiden.com> wrote in Start off with something simple - like a hello world socket code.news:1164932082.913991.251940@f1g2000cwa.googlegroups.com: > I am hoping to find someone who has already written the "complex > conversation" code and to study it. Any help is appreciated. A SMTP server is not that trival :-) That would be a great start. can someone post or point me to such an
example? Spam Catcher wrote: Show quoteHide quote > "iMaiden" <googlegro***@theindianmaiden.com> wrote in > news:1164932082.913991.251940@f1g2000cwa.googlegroups.com: > > > I am hoping to find someone who has already written the "complex > > conversation" code and to study it. Any help is appreciated. > > Start off with something simple - like a hello world socket code. > > A SMTP server is not that trival :-) On 2006-11-30, googlegro***@theindianmaiden.com <googlegro***@theindianmaiden.com> wrote:
> I am learning vb.net and trying to create a simple program to watch Ok... First things first - you need to understand how to write a server in> port 25 and receive email. I do not need any advanced features. I > just need to connect, watch and grab the emails as they come. This > seems like it should be a pretty simple but I can not seem to find any > examples in vb.net 8. Any help is appreciated. TIA > VB.NET. For an SMTP server, I think the first thing you should look at is how to write a basic windows service. You should be able to find examples of that in the documentation - Look at System.ServiceProcess.ServiceBase. Once you have that down, you should probably read and study the documentation on implementing an ayncronous server socket. I encourage you to use the asyncronous model, even though it is slightly more complicated then the normal syncronous socket model. It will provide you with much better overall performance because of the way the async sockets are implemented. There is a example of a simple server in the documentation. If you don't have the docs, start here: http://msdn2.microsoft.com/en-us/library/4as0wz7t.aspx Once you understand the basic concepts, then you should go to an rfc database (I usually go to http://www.rfc-editor.org) and look up the rfc's related to smtp. You should probably start with rfc2821: ftp://ftp.rfc-editor.org/in-notes/rfc2821.txt Then you will probably want to expand from there, like the rfc2554 which covers service extensions for authentication, etc. Once you begin writing code and playing with it - post back if you have any questions. It's much easier to help people with specific issues then the general "how do i write an smtp server" :) HTH -- Tom Shelton googlegro***@theindianmaiden.com wrote:
> I am learning vb.net and trying to create a simple program to watch TCPListener is your friend (It's in System.Net.Sockets).> port 25 and receive email. I do not need any advanced features. I > just need to connect, watch and grab the emails as they come. This > seems like it should be a pretty simple but I can not seem to find any > examples in vb.net 8. Any help is appreciated. TIA HTH. Regards, Branco. Thanks Branco
Dim Listener As New TcpListener("25") Listening = True Listener.Start() Do Until Listening = False Dim sb As New SocketAndBuffer() sb.Socket = Listener.AcceptSocket() sb.Socket.BeginReceive(sb.Buffer, 0, sb.Buffer.Length, SocketFlags.None, AddressOf ReceiveCallBack, sb) Loop Branco Medeiros wrote: Show quoteHide quote > googlegro***@theindianmaiden.com wrote: > > I am learning vb.net and trying to create a simple program to watch > > port 25 and receive email. I do not need any advanced features. I > > just need to connect, watch and grab the emails as they come. This > > seems like it should be a pretty simple but I can not seem to find any > > examples in vb.net 8. Any help is appreciated. TIA > > TCPListener is your friend (It's in System.Net.Sockets). > > HTH. > > Regards, > > Branco. Completed simple server to receive mail. Thanks for you help.
Sub ListenToServer() 'Try Dim LISTENING As Boolean Dim localhostAddress As IPAddress = ipAddress.Parse(ipAddress.ToString) Dim port As Integer = 25 '' PORT ADDRESS ''''''''''' making socket tcpList '''''''''''''''' Dim tcpList As New TcpListener(localhostAddress, port) Try tcpList.Start() LISTENING = True Do While LISTENING Do While tcpList.Pending = False And LISTENING = True ' Yield the CPU for a while. Thread.Sleep(10) Loop If Not LISTENING Then Exit Do Dim tcpCli As TcpClient = tcpList.AcceptTcpClient() Dim ns As NetworkStream = tcpCli.GetStream Dim sr As New StreamReader(ns) Dim returnedData As String = "220 smtp.sample.com SMTP server ready" Dim sw As New StreamWriter(ns) sw.WriteLine(returnedData) sw.Flush() Dim receivedData As String = sr.ReadLine() sw.Flush() returnedData = "250 smtp.sample.com Hello [71.105.78.90]" sw.WriteLine(returnedData) sw.Flush() receivedData = sr.ReadLine() receivedData = Trim(Replace(LCase(receivedData), "mail from:", "")) returnedData = "250 " + receivedData + "....Sender OK" sw.WriteLine(returnedData) sw.Flush() receivedData = sr.ReadLine() returnedData = "250 " + Trim(Replace(LCase(receivedData), "rcpt to:", "")) sw.WriteLine(returnedData) sw.Flush() receivedData = sr.ReadLine() returnedData = "354 Start mail input; end with <CRLF>.<CRLF>" sw.WriteLine(returnedData) sw.Flush() Do While receivedData <> "." receivedData = sr.ReadLine() sw.Flush() MsgBox(receivedData) Loop MsgBox("OVER") returnedData = "250 Queued mail for delivery" sw.WriteLine(returnedData) sw.Flush() sr.Close() sw.Close() ns.Close() tcpCli.Close() Loop tcpList.Stop() Catch ex As Exception 'error LISTENING = False End Try End Sub iMaiden wrote: Show quoteHide quote > Thanks Branco > > Dim Listener As New TcpListener("25") > Listening = True > Listener.Start() > Do Until Listening = False > Dim sb As New SocketAndBuffer() > sb.Socket = Listener.AcceptSocket() > sb.Socket.BeginReceive(sb.Buffer, 0, sb.Buffer.Length, > SocketFlags.None, AddressOf ReceiveCallBack, sb) > Loop > > > Branco Medeiros wrote: > > googlegro***@theindianmaiden.com wrote: > > > I am learning vb.net and trying to create a simple program to watch > > > port 25 and receive email. I do not need any advanced features. I > > > just need to connect, watch and grab the emails as they come. This > > > seems like it should be a pretty simple but I can not seem to find any > > > examples in vb.net 8. Any help is appreciated. TIA > > > > TCPListener is your friend (It's in System.Net.Sockets). > > > > HTH. > > > > Regards, > > > > Branco. I never used it, but Chad tells always that the software is on his site.
http://www.indyproject.org/ I hope this helps, Cor <googlegro***@theindianmaiden.com> schreef in bericht Show quoteHide quote news:1164928617.126983.68930@f1g2000cwa.googlegroups.com... >I am learning vb.net and trying to create a simple program to watch > port 25 and receive email. I do not need any advanced features. I > just need to connect, watch and grab the emails as they come. This > seems like it should be a pretty simple but I can not seem to find any > examples in vb.net 8. Any help is appreciated. TIA > 
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