?
Solved

Help using Sockets

Posted on 1998-09-11
2
Medium Priority
?
562 Views
Last Modified: 2010-05-18
I am trying to make a program for the ISP I work for that connects to the SMTP Server and verifies that a particular account exists using the 'VRFY mailbox' command.
I have practically no resources on Delphi, so I am mostly learning by trial and error and the HELP file included (no examples).

Here's what I have so far:
    UserAddr := User + '@myispdomain.net';
    SMTPComm := 'VRFY ' + UserAddr + Chr( 13 ) + Chr( 10 );
    WITH ClientSocket1 DO BEGIN
             Host := 'smtp.myispdomain.net';
      Port := 25;
      Open;
    END;

    Incoming := ClientSocket1.Socket.ReceiveText;
    WITH ClientSocket1 DO BEGIN
         Incoming := Copy( Incoming, 1, 3 );
           Val( Incoming, ErrCode, Code );
         IF ErrCode = 220 THEN BEGIN
            Socket.SendText( SMTPComm );
            Incoming := Socket.ReceiveText;
          Incoming := Copy( Incoming, 1, 3 );
              Val( Incoming, ErrCode, Code );
         END {IF};
         Close {Socket};
     END {WITH};

The Main problem I am having is that if I "trace" the program while debuggin, it works GREAT! but when I run the program through, it does NOT wait for a reply from the Server after connecting or sending the VRFY command, even when i created the socket with a ClientType := ctBlocking.

How can I make it WAIT for an event before continuing with the program?
Can anyone give me an example of Socket code of this nature with a basic event/error trap?


0
Comment
Question by:DropZone
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 18

Author Comment

by:DropZone
ID: 1339427
NOTE: I am trying NOT to use the SMTP ActiveX component included in Delphi3 because I want to compile the program into a single EXE file for simplicity.
0
 
LVL 8

Accepted Solution

by:
ZifNab earned 300 total points
ID: 1339428
Hi DropZone,

Only one place when you need to work with TSocket, TSmtp, etc...

Go to freeware components of

http://www.rtfm.be/fpiette/indexuk.htm

Send him just a postcard and add yourself to the free (great by the way!) Help mailing list!

Look at his demo-examples too! Everything WITH SOURCES

Regards, Zif.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
Suggested Courses
Course of the Month8 days, 14 hours left to enroll

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question