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  • Users: gp8
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  1. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    tcswan I know and as other before have mentioned we may have more than one actual problem here showing similar symptoms. Anyway I hope this works out for you. GP8
  2. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    Hello All, over a week gone by now and still no complaints. I agree the relay option is a workaround but as it appears to have done the trick I'm happy. msdIT, Sorry for the poor diagram!! inside net---------Firewall---------Internet | |...
  3. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    Hello all, good news. I set up an smtp relay out on a dmz and had my mx records changed to suit, guess what? It appears to have done the trick. I can certainly now send mail to the domains I previously could not. I can only put this down to the "_" that is in my mail servers hostname and...
  4. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    Hello All, I agree totally with msdIT regarding installing MS patches, I have lost servers in the past causing me a lot of grief. The use of the "_" in the host name is something that has been in the back of my mind for a while. I have discussed this with my ISP and another supplier who both...
  5. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    Hi Kilfarsnar, I agree that a rebuild is a last resort and avery drastic one at that. I would be very interested to hear the result should you go down that route. cheers GP8
  6. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    Thanks for your responses. just to bring you up to date. The problem still persists. Things I have tried: I edited the registry to force a new dns lookup for every domain ( the dafault is to cache a 1000 entries). I have had my isp check out my reverse dns, its ok. I have deleted the...
  7. gp8

    [Host Unreachable] Exchange 5.5 Internet mail service

    Hi , 99% of mails leave the IMS OK but a few will just sit and when looking at the details it says [Host unreachable]. I have tried nslookup to the host and get a valid response, I have even managed to ping the host in some instances I have tried different dns servers address's with no...
  8. gp8

    Exchange 5.5 Host Unreachable

    Hi , I am experiencing the same problem. 99% of mails leave the IMS OK but a few will just sit and when looking at the details it says [Host unreachable]. I have tried nslookup to the host and get a valid response, I have even managed to ping the host in some instances I have tried different...

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