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Telnet to Mail Server Problems

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  • Telnet to Mail Server Problems

    Hello everybody,

    i'm administrating varius mail servers for our clients and on some of them i experienced a problem of sendig mail to certain domains. Messages for some domains remains into the quees with this message "The semaphore timeout period has expired". So i tried to telnet to one of this domain and i was soprised. I was unable to connect via telnet on port 25 to those servers. So i checked up if i can connect to those serves directly from the router and i did it. I think its a problem on firewall Watchguard X500 but its not under my menagments so i don't know what can be. On Cisco PIX firewalls there was a command fixup dns 512 that make similar problems. Somebody had similar experience?

    Thanks

  • #2
    can you give up more details about the mail servers?

    os, configuration, etc.
    Good Luck

    Shai

    MCSE 2003+Security;MCSE 2003+Messaging
    HP ASE;HP AIS;HP APS

    So, from me to all of you out there, wherever you are, remember:
    the light at the end of the tunnel may be you. Good Day!

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