[CentOS] Re: Cron not sending e-mails anymore

Have you checked your /var/log/maillog and /var/log/cron? This will
let  you figure out if cron is actually not sending mails anymore, or
if it is and they're simply not getting past sendmail.
It's possible that your ISP has a new policy that is rejecting your
mails due to blacklisting or DNS issues. That's just a guess though,
your logs will tell you more.

Cian