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Test online your SMTP server

Discussion in 'Security' started by Thibaut, Dec 13, 2006.

  1. #1
    Hello friends,

    just to inform you about the recent online availability of this program of mine. This one will test the security of your SMTP server and report any trouble that may occur.
    Check it here.
    SEMrush
    Cheers !
    Thibaut
     
    Thibaut, Dec 13, 2006 IP
    nks likes this.
    SEMrush
  2. nks

    nks Well-Known Member

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    #2
    wow... 28 tests to perform. Quite a rigorous one, I must say :)
     
    nks, Dec 13, 2006 IP
  3. Thibaut

    Thibaut Active Member

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    #3
    I can add as many tests as you want. The program checks for third party relaying, TLS support, AUTH, VRFY, try to guess the MTA used and look for blacklist.

    Hope this helps.

    Cheers !
    Thibaut
     
    Thibaut, Dec 13, 2006 IP
  4. Carlito

    Carlito Peon

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    #4
    Is that good when it says "Host is an open relay !"? :D
    Heh, probably not, what exactly does that mean? It stopped on test 22/28.
     
    Carlito, Dec 13, 2006 IP
  5. Thibaut

    Thibaut Active Member

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    #5
    Its not so good, actually reliable MTA like Postfix or Sendmail go up to test #28. It means you have a minor security trouble with your MTA. By the way tests beyond #10 are quiet tricky (espcially for Exchange ;) . You should really worry if you fail on test #1 and #2.

    Cheers !
    Thibaut
     
    Thibaut, Dec 13, 2006 IP
  6. WiredTree Zac

    WiredTree Zac Peon

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    #6
    Cool program, thanks for the link. All tests passed :)
     
    WiredTree Zac, Dec 19, 2006 IP
  7. Thibaut

    Thibaut Active Member

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    #7
    Congratulations for your reliable and safe MTA :p

    Cheers !
     
    Thibaut, Dec 20, 2006 IP
  8. Libertate

    Libertate Guest

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    #8
    Hmmm... Actually my mail server just dropped yours after too many bad stuff.

    From test 15 through 19 you keep trying to send <test@[xx.xx.xx.xx]> where the IP is my mail server, and my server keep saying you cannot use literals (domain literals not allowed). So after the fifth reset it drops you. :D

    So, if my server would not drop you for thinking that you are a spammer, what would the remaining tests be?

    I won't be able to test it again, as my mail server now will block your server's IP for an extended period.
     
    Libertate, Dec 21, 2006 IP
  9. hans

    hans Well-Known Member

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    #9
    it actually and precisely is extremely bad to be open relay
    open relay means simply that ANYONE out there can use your smtp sertver to mail millions of spam free of charge thru your smtp server.
    that will most likely put YOUR server/IP soonest on all global blacklists and redirect all your true mail into spam or block them off

    if you tell what mail system you use ( postfix ) ? then you may get solutions. there are clean methods to allow only authorized traffic and thus keep your own records white and clean of spam record-entries in blacklists
     
    hans, Jan 6, 2007 IP
  10. richard_ha

    richard_ha Peon

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    #10
    Cool site.

    My exchange fails at test 17. Why is this and how do I fix it?
     
    richard_ha, Oct 30, 2007 IP
  11. hans

    hans Well-Known Member

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    #11
    operating system ? Linux or ??
    MTA ? Pfx or ??
    do you have root server or shared hosting for your smtp server ??

    some FULL details are needed if you love real helpful answers
     
    hans, Oct 30, 2007 IP
  12. richard_ha

    richard_ha Peon

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    #12
    Its my own server so I have full control

    Microsoft Server 2003 and Exchange Server 2003
     
    richard_ha, Nov 1, 2007 IP
  13. Martens

    Martens Peon

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    #13
    Nice thanks:cool:
     
    Martens, Nov 5, 2007 IP
  14. jexxie

    jexxie Peon

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    #14
    Pretty cool, thanks!

    Are you willing to release the source code?
     
    jexxie, Nov 15, 2007 IP
  15. Thibaut

    Thibaut Active Member

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    #15
    Hello,

    Its a C program running under Linux.
    Why do you need the source code ? Educationnal purposes ?

    Regards
    Thibaut
     
    Thibaut, Nov 26, 2007 IP
  16. eSupun

    eSupun Peon

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    #16
    The best thing is it's still working. :) Thanks.
     
    eSupun, Sep 3, 2010 IP
  17. Thibaut

    Thibaut Active Member

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    #17
    Its been already a while I opened this thread. Gee, almost 4 years :) By the way, the site is still up and running. I recently had minor issues with the script but this is okay now. If you want to comment on, or ask for improvement, never hesitate.
     
    Thibaut, Sep 20, 2010 IP
  18. KiiSH

    KiiSH Member

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    #18
    I get a white page when i press Test

    Edit: worked 2nd time :)
     
    KiiSH, Sep 20, 2010 IP
  19. daymzvcm

    daymzvcm Peon

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    #19
    You can also run a complete mail server security test on EmailSecurityGrader.com – it has an extensive Open Relay test (including % hacks) and also includes several other email security tests (such as SPF, DNSBL/Spam Blacklist) which noawadays are at least as important as Open Relay.
     
    daymzvcm, Nov 4, 2010 IP
  20. sanyi007

    sanyi007 Peon

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    #20
    28/28, none failed. That's the way, little kloxo :D
     
    sanyi007, Dec 13, 2010 IP