Web server Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8e-fips-rhel5 PHP/5.2.9
MySQL database 5.0.77
For some unknown reason, emails stopped being sent from about 3 different installs of drupal/ubercart. The only thing these sites have in common are that they're on the same servers. Above are the specs. They're all Drupal 6.14, Ubercart 2x, only one is updated to latest version of ubercart, but none are sending emails. Same with webform. Any idea what might have caused this? I'm thinking something server-wise but thought I'd ask here as well, tap into some groupthink.