For a couple of weeks I've been getting a lot a bounce mails like the one below when I try to post to a GNOME hosted mailing list. It used to happen about once a week, but starting a few days ago it now happens every time I try to post.

I clicked on the links in these messages at it seems my ISP's mail system has been placed on this UCEPROTECT blacklist. I've tried contacting my ISP about this problem and they're just ignoring me. 
        
This issue is precluding me from doing important tasks, like sending release announcements. I'm also unable to participate in mailing list discussions with my team. 

Can something please be done about this?

-------- Forwarded Message --------
        From: Mail Administrator <Postmaster@cox.net>
        Reply-to: <Postmaster@cox.net>
        To: jrliggett@cox.net
        Subject: Mail System Error - Returned Mail
        Date: Wed, 15 Jun 2011 16:50:46 -0400
        
        Recipient: <gnome-announce-list@gnome.org>
            Reason:    5.7.1 Service unavailable; Client host [68.230.241.143] blocked using dnsbl-1.uceprotect.net; IP 68.230.241.143 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=68.230.241.143
        
            Recipient: <anjuta-devel-list@gnome.org>
            Reason:    5.7.1 Service unavailable; Client host [68.230.241.143] blocked using dnsbl-1.uceprotect.net; IP 68.230.241.143 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=68.230.241.143
        
            Recipient: <anjuta-list@gnome.org>
            Reason:    5.7.1 Service unavailable; Client host [68.230.241.143] blocked using dnsbl-1.uceprotect.net; IP 68.230.241.143 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=68.230.241.143
         
          
         Please reply to <Postmaster@cox.net> 
         if you feel this message to be in error.
        MHTML Document attachment
        -------- Forwarded Message --------
        From: James Liggett <jrliggett@cox.net>
        To: gnome-announce-list <gnome-announce-list@gnome.org>
        Cc: anjuta-devel-list <anjuta-devel-list@gnome.org>, anjuta-list
        <anjuta-list@gnome.org>
        Subject: [anjuta-devel] anjuta-extras 3.1.2
        Date: Wed, 15 Jun 2011 13:50:43 -0700
        
        About Anjuta IDE
        ================
        
        Develop software in an integrated development environment
        
        Anjuta-extras contains additional plugins for Anjuta.
        
        News
        ====
        
        New:
        - Sample, scinitlla, and scratchbox plugins updated to work with GTK+ 3.x
          (Sébastien Granjoux)
        - Profiler and valgrind plugins removed
        
        
        Download
        ========
        
        http://download.gnome.org/sources/anjuta/3.1/anjuta-extras-3.1.2.tar.xz  (1.90M)
          sha256sum: 9a81be7dfb7fbd1483b05477da4d14a4dc664101dbca763082d5fa51fe88d33b
        
        http://download.gnome.org/sources/anjuta/3.1/anjuta-extras-3.1.2.tar.bz2 (2.47M)
          sha256sum: 54c67a82fddec76ac3789b37364e39d04fc3a7417add05f29dad7ea045bc4e57