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SMTP error 505 Client was not authenticated

Discussion in 'E-mail Discussions' started by myweb, Jul 1, 2010.

  1. myweb

    myweb Well-Known Member

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    I have a client who has an email forwarder that forwards mail to 3 different mail addresses.

    However, whenever a mail is received at the forwarder address, an error message (505 Client was not authenticated) below is returned to the sender. What does this actually mean?

    -----------------------------------------------
    This message was created automatically by mail delivery software.

    A message that you sent could not be delivered to one or more of its
    recipients. This is a permanent error. The following address(es) failed:

    aaa@remote-server.domain
    (ultimately generated from 111@my-server.domain)
    SMTP error from remote mail server after RCPT TO:<aaa@remote-server.domain>:
    host mx.remote-server.domain [xxx.xxx.xxx.xxx]: 505 Client was not authenticated

    bbb@remote-server.domain
    (ultimately generated from 111@my-server.domain)
    SMTP error from remote mail server after RCPT TO:<bbb@remote-server.domain>:
    host mx.remote-server.domain [xxx.xxx.xxx.xxx]: 505 Client was not authenticated

    ccc@remote-server.domain
    (ultimately generated from 111@my-server.domain)
    SMTP error from remote mail server after RCPT TO:<ccc@remote-server.domain>:
    host mx.remote-server.domain [xxx.xxx.xxx.xxx]: 505 Client was not authenticated
     
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