Cannot reach certain mail servers

From: Sysadmin (sysadmin_lists_at_iwapps.com)
Date: 11/23/04

  • Next message: Ed Greshko: "Re: GUI can't start !" 
    To: redhat-list@redhat.com
Date: 23 Nov 2004 13:35:50 -0700

    I have recently noticed a growing problem and am curious if anyone else
    is seeing the same. There are certain email servers that I am not able
    to reach.
      I get a "read timeout error" I used the standard 'telnet mailhost 25`
    to troubleshoot and found that I am able to reach certain site just
    fine. That being I get the RFC required banner. While others I get
    nothing. It started out as some .gov sites (e.g. fernald.gov). But now
    we are unable to reach AOL.com as well.
      I have even gone as far as looking at the packets with a sniffer. I
    DO find differences. The response coming back is different.
      The REAL kicker is that the results vary by OS and connect type,

    RH8 - LAN connection - doesn't work here but does in another geographic
    location
    Windows XP - LAN - 2 different locations - doesn't work
    Windows XP - Dialup - works
    MAC OSX - LAN - Location 2 - works

    The server used for the test case is running Sendmail 8.1.??. I am
    running postfix 2.0.19 on Redhat 8.

    Anybody seeing this or have any ideas. 

    -- 
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  • Next message: Ed Greshko: "Re: GUI can't start !"

    Relevant Pages

    • Re: Cannot reach certain mail servers
      ... Sysadmin wrote: ... > I have recently noticed a growing problem and am curious if anyone else ... There are certain email servers that I am not able ... The receiving SMTP servers are most likely doing DNS and reverse DNS ...
      (RedHat)
    • Re: Cannot reach certain mail servers
      ... On Tuesday 23 November 2004 14:35, Sysadmin wrote: ... > I have recently noticed a growing problem and am curious if ... There are certain email servers ... unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe ...
      (RedHat)