mailserver

I have a dovecot mail server and a java web application. When I want to send an email, it shows an error with the following message: 451.4.3.0 Error. queue file write error. I'm testing from my desktop in my office. It didn't happen before. The authentication is fine. The server is RHEL 7. I...

When I tried to restart the httpd service in my server it shows something like this. Starting httpd: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs I tried rebooting the server, copying the...