I have a CentOS 4 server with Cyrus and Sendmail.
Some emails sent are not delivered (to my Yahoo address, it's working). I'm not sure if they are rejected by the remote servers or not sent.
The emails are sent from mailboxes that are NOT configured on the local server (these are "virtual" addresses, but not SPAM).
Please refer to the attached log of an example (IP addresses and aliases were changed).
I need help in configuring the server to successfully send these messages.