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535 invalid authentication data, not consisten

Discussion in 'E-mail Discussions' started by Lyttek, Nov 8, 2010.

  1. Lyttek

    Lyttek Well-Known Member

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    User reported sending of email stopped working this morning. I've been testing and have narrowed it down only slightly.

    User has Embarq as an ISP. email address is john@domain.com

    Various exim logs show the same thing: 535 invalid authentication data

    I've reset, deleted, recreated the account on two different machine using three different email programs within their office, all with the same result.

    Setting up the email address at my office, on AT&T it works fine.

    Manually tested using the following commands:

    telnet mail.domain.com 587
    ehlo
    auth login
    (base64 encoded email)
    (base64 encoded password)

    At this point, on my machine I get an 'authentication succeeded' message. On the non working systems, this is where the 535 message arrives.

    It does not seem to matter what email address/password I use for authentication... they all fail.

    The only difference I've seen so far is the non-working system is Windows XP SP2 and mine is SP3. Given that they've been working up until today, I find it hard to believe that matters.

    Thoughts?
     
  2. Lyttek

    Lyttek Well-Known Member

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    As another test, I just ran a putty tunnel from local 587 to remote 26 where I'm running another copy of exim.

    When going through the tunnel, it works fine. This leads me to believe that Embarq is somehow munging the login info...

    Anyone concur/disagree?
     
  3. Lyttek

    Lyttek Well-Known Member

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    Is there a way to see exactly what characters are being passed by the ISP? I think the encoded data is being manipulated...

    I've even spoken to a "lead tech" who kept bringing up Exchange...

    #$^@^@^@$#!!!!
     
    #3 Lyttek, Nov 8, 2010
    Last edited: Nov 8, 2010
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