Dont let me delete forwarders in cpanel

Just for fun, have you tried another browser to be sure its not some sort of cache issue?

 

Permissions

camposomar did not say exactly what the incorrect permissions were, but here are the permissions and ownerships that should be set on the files in the /usr/local/cpanel/base/frontend/x3/mail/ directory:

Code:

# ls -alh /usr/local/cpanel/base/frontend/x3mail
total 244K
drwxr-xr-x  8 root root 4.0K Jun  1 22:00 ./
drwxr-xr-x  8 root root 4.0K Aug 12  2008 ../
lrwxrwxrwx  1 root root   14 Dec 17  2008 autodir -> ../x3/autodir//
drwxr-xr-x 15 root root  12K Jun  1 22:00 branding/
-rw-r--r--  1 root root  464 Jun  5  2007 branding.conf
lrwxrwxrwx  1 root root   18 May 30  2008 charset.html -> ../x3/charset.html
drwxr-xr-x  2 root root 4.0K Dec 16  2009 contact/
-rw-r--r--  1 root root  322 Jun  5  2007 cpanelplugins.conf
-rw-r--r--  1 root root  69K Jun  1 22:00 .cpanelsync
-rw-r--r--  1 root root  26K Jun  1 22:00 .cpanelsync.md5s
-rw-r--r--  1 root root 1.9K Jun  1 22:00 .cpanelsync.new
lrwxrwxrwx  1 root root    9 May 30  2008 css -> ../x3/css/
lrwxrwxrwx  1 root root   15 Dec 16  2009 css2-min -> ../x3/css2-min//
lrwxrwxrwx  1 root root   16 May 30  2008 dynamicui -> ../x3/dynamicui//
-rw-r--r--  1 root root  12K Aug 25 21:53 dynamicui.conf
lrwxrwxrwx  1 root root   15 May 30  2008 expander -> ../x3/expander//
lrwxrwxrwx  1 root root   28 Dec 16  2009 extended_statsbar.html -> ../x3/extended_statsbar.html
lrwxrwxrwx  1 root root   33 Dec 16  2009 extended_stats_disable.html -> ../x3/extended_stats_disable.html
lrwxrwxrwx  1 root root   32 Dec 16  2009 extended_stats_enable.html -> ../x3/extended_stats_enable.html
lrwxrwxrwx  1 root root   38 Oct  9  2009 fantastico -> /usr/local/cpanel/3rdparty/fantastico//
drwxr-xr-x  2 root root 4.0K Feb 17  2010 getstarted/
lrwxrwxrwx  1 root root   10 Dec 17  2008 help -> ../x3/help/
lrwxrwxrwx  1 root root   23 May 30  2008 hidegraphics.html -> ../x3/hidegraphics.html
lrwxrwxrwx  1 root root   20 May 30  2008 hideicons.html -> ../x3/hideicons.html
lrwxrwxrwx  1 root root   13 May 30  2008 images -> ../x3/images//
-rw-r--r--  1 root root   75 Dec 17  2008 index.html
lrwxrwxrwx  1 root root    8 May 30  2008 js -> ../x3/js/
lrwxrwxrwx  1 root root   13 Dec 16  2009 js2-min -> ../x3/js2-min/
drwxr-xr-x  2 root root 4.0K May 30  2008 lang/
drwxr-xr-x  2 root root 4.0K Dec 22  2009 langcss/
lrwxrwxrwx  1 root root   17 May 30  2008 logout.html -> ../x3/logout.html
lrwxrwxrwx  1 root root   10 Dec 17  2008 mail -> ../x3/mail/
lrwxrwxrwx  1 root root   15 May 30  2008 mainicons -> ../x/mainicons//
lrwxrwxrwx  1 root root   15 May 30  2008 nvget.xml -> ../x3/nvget.xml
lrwxrwxrwx  1 root root   18 May 30  2008 nvsetall.xml -> ../x3/nvsetall.xml
lrwxrwxrwx  1 root root   15 May 30  2008 nvset.xml -> ../x3/nvset.xml
lrwxrwxrwx  1 root root   13 May 30  2008 passbar -> ../x3/passbar/
lrwxrwxrwx  1 root root   13 May 30  2008 passwd -> ../x3/passwd//
-rw-r--r--  1 root root  60K Jun  5  2007 preview.jpg
lrwxrwxrwx  1 root root   16 May 30  2008 resellers -> ../x3/resellers//
lrwxrwxrwx  1 root root   14 May 30  2008 security -> ../x3/security/
lrwxrwxrwx  1 root root   14 May 30  2008 setlang -> ../x3/setlang//
drwxr-xr-x  2 root root 4.0K May 30  2008 shortcuts/
lrwxrwxrwx  1 root root   23 May 30  2008 showgraphics.html -> ../x3/showgraphics.html
lrwxrwxrwx  1 root root   20 May 30  2008 showicons.html -> ../x3/showicons.html
lrwxrwxrwx  1 root root   17 May 30  2008 status.html -> ../x3/status.html
lrwxrwxrwx  1 root root   21 May 30  2008 stdbheader.html -> ../x3/stdbheader.html
lrwxrwxrwx  1 root root   12 May 30  2008 style -> ../x3/style//
lrwxrwxrwx  1 root root   24 Dec 17  2008 switchaccount.html -> ../x3/switchaccount.html
lrwxrwxrwx  1 root root   22 Dec 17  2008 switchtheme.html -> ../x3/switchtheme.html
lrwxrwxrwx  1 root root   21 Dec 16  2009 trademarks.html -> ../x3/trademarks.html
lrwxrwxrwx  1 root root   19 May 30  2008 tutorial.html -> ../x3/tutorial.html
-rw-r--r--  1 root root  880 Dec 17  2008 update_branding.pl
lrwxrwxrwx  1 root root   33 Dec 16  2009 video_tutorial_include.html -> ../x3/video_tutorial_include.html
lrwxrwxrwx  1 root root   23 May 30  2008 webmaillogin.html -> ../x3/webmaillogin.html
-rw-r--r--  1 root root   20 Jun  5  2007 Xver
lrwxrwxrwx  1 root root    9 May 30  2008 yui -> ../x3/yui/

camposomar did say that the problem was caused by incorrect permissions on /usr/local/cpanel/base/frontend/x3/mail/fwds.html, so hopefully the directory listing from a known-working server may be helpful.