Can't send email

Hi all;

We are running Omeka on an EC2 instance, and I can’t get Omeka to send any email of any kind. Anytime it tries, I get an exception: ‘Zend_Mail_Transport_Exception’ with message 'Unable to send mail. ’

I’ve verified that sendmail is installed and working (I’ve successfully sent mail from the command line), and also that the PHP mail() command works (by writing a small script that uses it to send an email). I’ve also checked the Omeka config file and it’s set to send mail via sendmail. Does anyone have any idea what might be wrong?

Have you checked the server logs? Some hosting companies required that outgoing mail be from the registered domain, rather than a third party service ( you at will work, you at gmail will now)

We eventually gave up on using sendmail and created a google account to use with SMTP. WAY easier to configure and use.