Re: [cobalt-users] weird email problem

["wcstaff" <wcstaff@xxxxxxxxxxxx>]

I have come across a weird email problem with a customer of mine. When some
people try to send an email to them or reply to their email. They get a
reply like this:
The mail server at smtp1.ij.net could not deliver your message:

    user@xxxxxxxxxxx:
    24.129.183.219 does not like recipient.

Remote host said: 550 5.7.1  user@xxxxxxxxxxx  relaying denied
check your mail first or restart your mail session giving up on
24.129.183.219.

What does this mean? I can send email to the customers just fine, but
certain people cannot.