Cron Not Sending Mail

[APseudoUtopia]

Cron is not sending output as emails. I noticed this when I stopped
seeing the output of a backup script in my daily email. I thought
there was a problem with the backup script - but no, it's cron not
sending the emails.

I had this problem before on 6.1, which I never found a solution to. I
gave up on it, and eventually I upgraded to 7.1. After the upgrade,
cron worked perfectly. However, I just noticed that it stopped working
again. I have no idea what changed (It's a production server, I
haven't been playing with config files).

User www's mail is redirected to root, which is redirected to a @gmail
account via /etc/aliases.
This is on 7.1-RELEASE-p3 running a custom kernel.

Any solution to this problem would be fantastic. I use the emails from
cron on a daily basis, and it really messes me up to have it not
working.

#####
# User www's crontab
# Note, I also tried removing the MAILTO to no avail
#####
MAILTO=root
# m     h       dom     mon     dow     cmd
*       *       *       *       *       echo "Hello"


####
# /var/log/cron
####
Mar  1 19:22:00 youcant /usr/sbin/cron[22627]: (operator) CMD
(/usr/libexec/save-entropy)
Mar  1 19:22:00 youcant cron[22627]: NSSWITCH(nss_method_lookup): nis,
group_compat, setgrent, not found
Mar  1 19:22:00 youcant cron[22627]: NSSWITCH(nss_method_lookup): nis,
group_compat, endgrent, not found
Mar  1 19:22:00 youcant cron[22627]: NSSWITCH(nss_method_lookup): nis,
passwd_compat, endpwent, not found
Mar  1 19:22:00 youcant /usr/sbin/cron[22628]: (www) CMD (echo "Hello")
Mar  1 19:22:00 youcant cron[22628]: NSSWITCH(nss_method_lookup): nis,
group_compat, setgrent, not found
Mar  1 19:22:00 youcant cron[22628]: NSSWITCH(nss_method_lookup): nis,
group_compat, endgrent, not found
Mar  1 19:22:00 youcant cron[22628]: NSSWITCH(nss_method_lookup): nis,
passwd_compat, endpwent, not found
Mar  1 19:22:00 youcant cron[22630]: NSSWITCH(nss_method_lookup): nis,
group_compat, setgrent, not found
Mar  1 19:22:00 youcant cron[22630]: NSSWITCH(nss_method_lookup): nis,
group_compat, endgrent, not found
Mar  1 19:22:00 youcant cron[22630]: NSSWITCH(nss_method_lookup): nis,
passwd_compat, endpwent, not found



####
# /var/log/maillog
####
Mar  1 19:22:00 youcant sendmail[22630]: n21JM0Gl022630: from=www,
size=0, class=0, nrcpts=0,
msgid=<200903011922.n21JM0Gl022630 at youcant.tastetherainbow.ws>,
relay=www at localhost