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Internet Related/Filtering/Firewall Thread, Question about mail server settings for new ISP in Technical; 116 is the webserver, our Palo blocks this, and telnet is disabled. I'd be worried if you could......
  1. #16

    Oaktech's Avatar
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    116 is the webserver, our Palo blocks this, and telnet is disabled. I'd be worried if you could...


  2. #17

    twin--turbo's Avatar
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    mxtoolbox reports you may be open relay and reverse DNS not valid.

    Rob

  3. #18

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    reverse DNS may not have been actioned by ISP yet... How do we deal with open relay then?

  4. #19

    twin--turbo's Avatar
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    Looks like relay is refused "550 5.7.1" when testing it.

    Do some testing of your own though to be sure using the command line from outside the school.

    Rob

  5. Thanks to twin--turbo from:

    Oaktech (12th August 2013)

  6. #20

    Oaktech's Avatar
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    Ok, ISP is being a bit awkward, I don't know what the reverse DNS should be and they are pumping me for the information...

    Does the reverse DNS need to be set to our email domain of leaf.bournemouth.sch.uk or our sendmail subdomain of mail1.leaf.bournemouth.sch.uk?

    Sorry for all the questions, but I've not really ever had to deal with the outside world before!

  7. #21

    twin--turbo's Avatar
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    mxtoolbox reports it as possibly open but it does not seem to be.

    you should see some tests to/from my "f2s.com" account in your message trackign taht should indicate what is preventing the message being sent.

    Rob

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    Oaktech (14th August 2013)

  9. #22

    Oaktech's Avatar
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    I'm not seeing any messages at all from that domain...

  10. #23

    twin--turbo's Avatar
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    Quote Originally Posted by Oaktech View Post
    I'm not seeing any messages at all from that domain...
    Use powershell for wildcards.

    Wildcard searches in Exchange message tracking | Scotts IT ramblings


    may require some playign with, you will want to run your own tests.


    Rob
    Last edited by twin--turbo; 12th August 2013 at 01:44 PM.

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    Oaktech (14th August 2013)

  12. #24

    twin--turbo's Avatar
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    replace where{$_.sender...... }
    with
    where {$_.recipiens -like "*@f2s.com"}

    watch out for the date format as it may be mm/dd/yyy


    Rob

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    Oaktech (14th August 2013)

  14. #25

    Oaktech's Avatar
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    I can't get this to run - we don't use powershell much and it is being blocked!

  15. #26

    twin--turbo's Avatar
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    is this on 2010?

    Needs to run on the mailbox server, whats blcoking it?

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    Oaktech (14th August 2013)

  17. #27

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    its a p2v 2003 box. I just get a message saying that "The running of scripts is not permitted on this server. This instance has been blocked"

  18. #28

    twin--turbo's Avatar
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    Just realised it's 2k3...

    Not sure how you get to the advance message tracking. not used 2k3 for a while.

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    Oaktech (14th August 2013)

  20. #29
    cpjitservices's Avatar
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    reverse DNS looks something like this: 25.2.0.192.in-addr.arpa. PTR host.example.com"

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    Oaktech (14th August 2013)

  22. #30

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    I've stopped the open relay...

    What I've done is:

    Under the default smtp virtual server properties, I've gone to access and then to relay then changed "all except the list below" to "only the list below" then added "group of computers" and then specified the IP ranges we hand out internally, I've also kept the tick box in "Allow all computers which successfully authenticate to relay regardless of the above list"

    Under routing groups, first routing group, connectors, first smtp connector, I've gone into the properties, then into address space and changed the * in the smtp address space to our mail domain.

    Our mail still flows OK and MX toolbox says yes!

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