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MultiMail 2.0 - Freeware SMTP stress testing tool

, 3 Oct 2003
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This free program can be used to stress test SMTP servers. It also aids anti-Spam tool developers as a useful mail-bombardment tool.

About MultiMail 2.0

MultiMail 2.0 is a multi-threaded SMTP stress testing program which also doubles up as a handy tool for anti-Spam software development. It starts multiple threads, each sending a large number of mails in parallel to a specified SMTP server. MultiMail 2.0 is  freeware and can be used by anyone without the author's explicit permission.

How it came about?

Version 1.0

I wrote the first version while I was developing my own anti-Spam program Pop 3 Protector (discontinued). I used it to bombard test POP accounts with a large amount of email from multiple fake email addresses and with multiple subject headers.

A few months ago [here the current time is Feb 2002], I was asked to try out three different Linux based SMTP servers and decide on the fastest one. That's when I got a chance to use this tool once again. I sent huge amounts of mail through each server and recorded connection and mail delivery speeds. To increase the load I made the program multi-threaded. The user can set the number of threads to use. In this particular version I have restricted this number to 10, to prevent malicious people from misusing this program. But for anyone who wants to use this as an SMTP stress tester, 10 threads running in parallel, each thread sending 1000 mails each, should be quite good enough.

Actually there is a sneaky way to over-ride the restrictions, which is by running multiple instances of the program. But for some strange reason I have noticed that this will considerably slow down the user's machine and I hope that will deter people from trying it out.

Version 2.0

Version 2.0 uses the ATL7 SMTP and MIME classes and so I have removed all my Winsock-SMTP-chat code from the program. This has enabled me to add support for attachments which is quite handy.

Sending mail using the ATL7 classes

  • Include the required header file
  • #include <span class="code-keyword"><atlsmtpconnection.h></span>
  • Call CoInitialize
  • CoInitialize(0);
  • And write code similar to below snippet
  • CMimeMessage msg;
    
    msg.SetSender(strSender);
    msg.AddRecipient(strRecepient);
    
    //Optional
    msg.SetSubject(strSubject);
    msg.AddText(strBody);
    msg.AttachFile(strAttachFile);
    
    CSMTPConnection conn;
    conn.Connect(server);
    BOOL bSuccess = conn.SendMessage(msg);
    conn.Disconnect();
  • Call CoUninitialize
  • CoUninitialize();

History

  • v1.0 - 22 Feb 2002
  • v2.0 - 05 Oct 2003

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Nish Nishant
United States United States
Nish Nishant is a Software Architect/Consultant based out of Columbus, Ohio. He has over 16 years of software industry experience in various roles including Lead Software Architect, Principal Software Engineer, and Product Manager. Nish is a recipient of the annual Microsoft Visual C++ MVP Award since 2002 (14 consecutive awards as of 2015).

Nish is an industry acknowledged expert in the Microsoft technology stack. He authored
C++/CLI in Action for Manning Publications in 2005, and had previously co-authored
Extending MFC Applications with the .NET Framework for Addison Wesley in 2003. In addition, he has over 140 published technology articles on CodeProject.com and another 250+ blog articles on his
WordPress blog. Nish is vastly experienced in team management, mentoring teams, and directing all stages of software development.

Contact Nish : You can reach Nish on his google email id voidnish.

Website and Blog

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Comments and Discussions

 
GeneralRe: Volunteers required urgently!!! Pin
Nish [BusterBoy]24-Feb-02 5:18
memberNish [BusterBoy]24-Feb-02 5:18 
GeneralRe: Volunteers required urgently!!! Pin
Anders Molin24-Feb-02 0:48
memberAnders Molin24-Feb-02 0:48 
GeneralRe: Volunteers required urgently!!! Pin
Nish [BusterBoy]24-Feb-02 1:34
memberNish [BusterBoy]24-Feb-02 1:34 
GeneralHmmm, buggy, and useless Pin
Anders Molin23-Feb-02 5:06
memberAnders Molin23-Feb-02 5:06 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]23-Feb-02 15:43
memberNish [BusterBoy]23-Feb-02 15:43 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin23-Feb-02 23:26
memberAnders Molin23-Feb-02 23:26 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]24-Feb-02 0:09
memberNish [BusterBoy]24-Feb-02 0:09 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin24-Feb-02 0:39
memberAnders Molin24-Feb-02 0:39 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]24-Feb-02 1:31
memberNish [BusterBoy]24-Feb-02 1:31 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin23-Feb-02 23:34
memberAnders Molin23-Feb-02 23:34 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]24-Feb-02 0:01
memberNish [BusterBoy]24-Feb-02 0:01 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin24-Feb-02 0:41
memberAnders Molin24-Feb-02 0:41 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]24-Feb-02 1:29
memberNish [BusterBoy]24-Feb-02 1:29 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]23-Feb-02 15:50
memberNish [BusterBoy]23-Feb-02 15:50 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin23-Feb-02 23:27
memberAnders Molin23-Feb-02 23:27 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]23-Feb-02 23:59
memberNish [BusterBoy]23-Feb-02 23:59 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin24-Feb-02 0:43
memberAnders Molin24-Feb-02 0:43 
GeneralRe: Hmmm, buggy, and useless Pin
Nish [BusterBoy]24-Feb-02 1:27
memberNish [BusterBoy]24-Feb-02 1:27 
GeneralRe: Hmmm, buggy, and useless Pin
Anders Molin24-Feb-02 7:53
memberAnders Molin24-Feb-02 7:53 
GeneralHmm.. Pin
Amanjit Gill22-Feb-02 13:27
memberAmanjit Gill22-Feb-02 13:27 
GeneralRe: Hmm.. Pin
Nish [BusterBoy]22-Feb-02 19:43
memberNish [BusterBoy]22-Feb-02 19:43 
GeneralRe: Hmm.. Pin
Mustafa Demirhan22-Feb-02 22:46
memberMustafa Demirhan22-Feb-02 22:46 
GeneralRe: Hmm.. Pin
Nish [BusterBoy]23-Feb-02 15:55
memberNish [BusterBoy]23-Feb-02 15:55 
GeneralRe: Hmm.. Pin
Jason Hooper23-Feb-02 0:41
memberJason Hooper23-Feb-02 0:41 
GeneralRe: Hmm.. Pin
Nish [BusterBoy]23-Feb-02 15:57
memberNish [BusterBoy]23-Feb-02 15:57 

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