Verify Email Addresses with VerifyRecipients

Download Chilkat Email ActiveX

Verify email recipients. This example demonstrates the usage of the VerifyRecipients method.

Please see this blog post for more information VerifyRecipients -- Validating Email Addresses

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATMAILLib2_TLB,
    CHILKATUTILLib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan2;
success: Integer;
email: CHILKATMAILLib2_TLB.IChilkatEmail2;
saBadAddrs: CHILKATUTILLib_TLB.ICkStringArray;
i: Integer;
n: Integer;

begin
//  The mailman object is used for sending and receiving email.
mailman := TChilkatMailMan2.Create(Self);

//  Any string argument automatically begins the 30-day trial.
success := mailman.UnlockComponent('30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Component unlock failed');

  end;

//  Set the SMTP server.
//  This code was tested against both mail.chilkatsoft.com
//  and smtp.comcast.net

//  mailman.SmtpHost = "mail.chilkatsoft.com";
//  mailman.SmtpUsername = "admin@chilkatsoft.com";
//  mailman.SmtpPassword = "****";

mailman.SmtpHost := 'smtp.comcast.net';

//  Create an email object.
//  We'll never actually send this email.  It's only used
//  to test the recipients.
email := CoChilkatEmail2.Create();

email.Subject := 'This is a test';
email.Body := 'This is a test';
email.From := 'Chilkat Support <support@chilkatsoft.com>';

//  Add recipients to be checked.
//  (When this was tested, a_real_person was replaced with
//  a valid email address.)
email.AddTo('A Real Person','a_real_person@comcast.net');
email.AddTo('Testing','doesNotExist7434@comcast.net');
email.AddTo('Admin','admin@chilkatsoft.com');
email.AddTo('Not Exist','doesNotExist@chilkatsoft.com');
email.AddCC('Not Exist','DoesNotExist7213@gmail.com');
email.AddBcc('Exists','chilkat.support@gmail.com');

//  NOTE: A mail server can only verify the email addresses
//  specific to it's domain.  Therefore, when using smtp.comcast.net,
//  only comcast.net email addresses will be flagged as invalid,
//  and when using mail.chilkatsoft.com, only chilkatsoft.com
//  email addresses are flagged as invalid.

//  Return all bad email addresses in saBadAddrs:

saBadAddrs := mailman.VerifyRecipients(email) as CHILKATUTILLib_TLB.ICkStringArray;
if (saBadAddrs = nil ) then
  begin
    ShowMessage(mailman.LastErrorText);

  end
else
  begin
    //  List the invalid email addresses:
    if (saBadAddrs.Count > 0) then
      begin

        n := saBadAddrs.Count;
        for i := 0 to n - 1 do
          begin
            Memo1.Lines.Add(saBadAddrs.GetString(i));
          end;

        //  Examine the SMTP session log to see how the email
        //  addresses were caught:
        ShowMessage(mailman.SmtpSessionLog);

      end;  end;
end;