I have a Ubuntu 14.04 VPS with a few sites.
If I run php -r "mail('[email protected], 'test', 'test');"
this gets delivered, but I have a couple of CMSs (Drupal and dokuwiki) that don't send any emails, including basic password reminder/registration.
I have checked and I am not blacklisted. Where should I look to start debugging ?
Edit: it seems the problem is that I have the incoming emails using a third party while postfix try to deliver the email locally (maybe looking at the alias file?).
How can I force postfix to NOT try to deliver the email locally ?