Administrator's Guide - Kerio Software Archive

Chapter 21Status InformationKerio MailServer allows the administrator (or any other person) to view its activities in greatdetail. Three kinds of information are available: status, logs and statistics.• You can view the status of the mail queue, delivery tasks and connections to particularKerio MailServer services.• Logs are files where information about certain events (e.g. error and warning reports, debugginginformation, etc.) are recorded. For detailed information on logs, see chapter 22.• Statistics contain detailed information about individual Kerio MailServer services usagesuch as received and refused messages, errors etc. Kerio MailServer can also show graphicallythe number of connections to individual services as well as the number of processedmessages for a given period.The following chapters describe what information can be viewed and how its viewing can bechanged to accommodate the user’s needs.21.1 Messages in queueAll email processed by Kerio MailServer is stored in the mail queue. Physically, this is thefolder store/queue in the directory where Kerio MailServer is installed. All messages areadded to this queue as two files:• The file with the .eml extension is the message itself• The file with the .env extension is the message’s SMTP envelope. This is used only forcommunication between SMTP servers and is discarded when the message is saved to thetarget mailbox.Both files have identical names.A message is sent from the mail queue either after it reaches the queue or in a time perioddefined in the scheduler — see chapter 8 for details. If the SMTP server sends messagesstraight to the target domains (i.e. no relay SMTP server is used) a situation can arise in whichthe message cannot be sent (no server for the target domain is available). In this case themessage returns to the queue and is sent again later.Note: If the server is in Offline mode, the message returns to the queue and the server attemptsto send it again in a time specified in the scheduler (Next Try is only set in Online mode). If theserver is in Offline mode (usually dial-up lines) then it is better to send messages via a relaySMTP server.235