Resolved Exchange help

Discussion in 'Software' started by Theprof, Sep 6, 2009.

  1. Sparky
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    Sparky Zettabyte Poster Moderator

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    Try routing by DNS...
     
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  2. Theprof

    Theprof Petabyte Poster

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    I just noticed something.... when I do a dns lookup on mydomainname.com I get mail.mydomainname.com Pref 10, TTL 3600 with the following IP address 72.167.82.11 which is not mine... but it is blacklisted.... this looks like a godaddy IP address...

    When I do an nslookup on it, I get:

    Name: p3pop01-v01.prod.phx3.secureserver.net
    Address: 72.167.82.11

    Does this mean I have to call GoDaddy to get a new IP that is not blacklisted?
     
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  3. craigie

    craigie Terabyte Poster

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    Mate the IP address should be yours.

    Basically, it looks like they have pointed it to the wrong IP.

    Also, you shouldn't have an IP blacklisted for MX records if it hasn't been used. However GoDaddy should be able to get them removed for you. Alternatively you can use the MXToolbox I gave you the link of earlier.
     
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  4. Sparky
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    Sparky Zettabyte Poster Moderator

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    Is GoDaddy your ISP? I thought they only did web and domain hosting. :blink

    If you cant telnet outbound on port 25 from the Exchange server then this is a big issue. Either DNS is playing up or you have changed the security on the SMTP connector or something like that so it cant send. Your published IP does not appear to be blocked for SMTP traffic as you can telnet from other hosts on the LAN.

    For the IP you have listed can you you not go back into the DNS config at GoDaddy and put in the published IP address of your router?
     
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  5. Theprof

    Theprof Petabyte Poster

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    No GoDaddy is not My ISP... but the interesting thing, I can telnet to cerforums lets say from my personal computer. I even connected it directly to the modem.... Could it be that my ISP is blocking the SMTP traffic some how?
     
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  6. Sparky
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    Sparky Zettabyte Poster Moderator

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    Unlikely as you can telnet on port 25 from a PC but not from the Exchange server. Both of which have the same published IP.

    Just as a quick test can you telnet onto 216.97.239.44 on port 25 from the Exchange server. This should eliminate any DNS issues.
     
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  7. Theprof

    Theprof Petabyte Poster

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    I just tried telneting to the mail.certforums.co.uk from my desktop pc and couldn't either.... I can telnet locally but not externally...

    I also just called my ISP and they're blocking both inbound and outbound smtp port 25... that would explain everything...

    Now my question is, can I use a different port? if so what port would it be?
     
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  8. craigie

    craigie Terabyte Poster

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    Try using Port 587 mate.
     
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  9. Sparky
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    Sparky Zettabyte Poster Moderator

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    You can make the Exchange server listen on any port, try 26 for example. This wont help your inbound email though as it will be port 25 by default from the sending server.

    What is your ISP all about?!? Whats the point in having a static IP if you cant even use it! :rolleyes:
     
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  10. Theprof

    Theprof Petabyte Poster

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    Yeah tell me about it.... oh well it's for studies and at least the internal works... I would of loved if it worked externally as well... but this is out my reach so I got to live with it or switch ISP's.... hmmm tempting...

    I do appreciate the help though and man have I learned a lot the last 2 days.....
     
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  11. craigie

    craigie Terabyte Poster

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    What happened with Port 587?
     
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  12. Sparky
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    Sparky Zettabyte Poster Moderator

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    No probs mate. :thumbleft
     
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  13. danielno8

    danielno8 Gigabyte Poster

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    i thought it was pretty standard for ISPs to block port 25, as they would want someone to have a business account if they were hosting mail? same with web sites i thought.
     
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  14. Sparky
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    Sparky Zettabyte Poster Moderator

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    Depends on the ISP mate, I have an Exchange server on my ADSL connection.
     
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  15. Theprof

    Theprof Petabyte Poster

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    Even with 587 it still doesn't work. and I am using a smarthost btw... with no DNS settings in the smtp virtual server.
     
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  16. Sparky
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    Sparky Zettabyte Poster Moderator

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    The smarthost server you are using will be listening on port 25 though, hence why you cant connect to it.
     
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  17. Theprof

    Theprof Petabyte Poster

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    Now what it's doing is failing and retrying before it would just sit in the queue for a very long time... DNS?
     
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  18. Sparky
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    Sparky Zettabyte Poster Moderator

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    Well, if you have changed the port then the connection may be able to get out however as there is nothing on the other side it will just fail, then it will retry.

    With port 25 blocked you might want to think about changing ISP or ask if you can get your line upgraded to a service that will allow SMTP traffic.
     
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  19. Theprof

    Theprof Petabyte Poster

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    Makes sense... well I have two options.... 1 upgrade to a business line or switch to a different ISP.. I currently have cable as my connection...
     
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  20. zebulebu

    zebulebu Terabyte Poster

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    Told ya :biggrin

    Seriously - hosting your own Exchange server at home falls into the category of 'things you can do... but it'll never work right...' :D

    Its one of the reasons I want to (eventually, when I can justify the grief of getting another line put into my goddamn basement) get a second ISP with some 'proper' IP space.
     
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