NDR - 5.5.0 smtp;550 Rule imposed mailbox

Posted on 2011-10-25
Last Modified: 2012-05-12
Hi Experts

See NDR message below I’ve not had problems communicating with this person before. I wonder if the reference to (I've used xxxxxxx to hide the actual address) has anything to do with this.
How can I confirm the issue is at the recipients end and why has this happened.
From: System Administrator []
Sent: Tuesday, 25 October 2011 12:29 p.m.
To: Rob Mitchell
Subject: Undeliverable: RE: Hello

Your message

  To:      Charmaine Bland
  Subject: RE: Hello
  Sent:    Tue, 25 Oct 2011 12:29:09 +1300

did not reach the following recipient(s): on Tue, 25 Oct 2011 12:29:08 +1300
    There was a SMTP communication problem with the recipient's email
server.  Please contact your system administrator.
    < #5.5.0 smtp;550 Rule imposed mailbox
access for refused: user invalid>
Question by:craigleenz
    LVL 12

    Expert Comment

    by:Gary Coltharp
    wellington is the authoritative server that is refusing to accept this email by rule. What rule? Dunno...maybe a whitelist/blacklist issue? Says user invalid though....leads me to believe the username is wrong?

    Author Comment

    thanks gcoltharp, is at the senders (Rob Mitchell's) end, this location no longer exist as far as I'm aware, it was deestablished a few months ago but still appears as an entry in my mailbox address list, out of interest, subsequent emails sent later to Charmaine appeared to have been delivered fine with no further bounce backs, and no changes made?
    LVL 12

    Expert Comment

    by:Gary Coltharp
    The server dns's okay and even pings. Something is answering as wellington!

    Author Comment

    could it be at the recipients end?
    LVL 12

    Expert Comment

    by:Gary Coltharp
    Hard to tell especially if it is working now. But that NDR clearly implies that wellington made the decision that this wasnt going to happen because the user was invalid.

    No clue m8

    Accepted Solution

    can this please be closed, the issue was at the recipients email end at that particular time, not the end as suggested by gcoltharp,

    Author Closing Comment

    no other plausible answers to this question.

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