[UC] Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host mazatl.ier.unam.mx.

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

<mfp at cie.unam.mx>: can't create user output file. Command output: procmail:
    Quota exceeded while writing "/var/spool/mail/mfp"
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From: mailman at cie.unam.mx
Subject: Bounce action notification
Date: Wed, 14 Aug 2013 13:13:48 -0500
Size: 19294
URL: <http://www.cie.unam.mx/pipermail/uc/attachments/20130814/e12a9691/attachment.mht>