Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host smtp37.relay.iad1a.emailsrvr.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<xslk at tinet.ie>: host mail1.tinet.ie[159.134.198.135] said: 550 5.1.1 User
    <xslk at tinet.ie> unknown (in reply to RCPT TO command)
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From: "confirming" <containers at lists.linux-foundation.org>
Subject: You have chosen to pay by credit card.
Date: Wed, 22 Feb 2012 08:18:59 +0000
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