Debug
Debug is a special log that allows detailed monitoring of certain information designed especially for solving problems. As default, it displays information relating to starting and stopping of Kerio MailServer, lists the services and the addresses and ports used for connection.
Other information relates to services and processes used to operate the server. There is a vast amount of information that can be monitored and if all of this information was displayed in the log window at the same time, it would be completely incomprehensible. Usually, you only need to display information relating to a particular service or function.
Warning: Displaying a vast amount of information also reduces Kerio MailServers speed. We recommend that you only display information that you are interested in and only when necessary.
Debug log settings
For the above reasons the Debug log allows you to define what information it will display. This can be done using the Set log events option in the context menu of the Debug window.
Figure 5. Debug log settings
Mail server activity section:
- Delivery queue processing
- Processing of the Mail Queue (sending and receiving messages, re-scheduling, etc.)
- SMTP client session
- Sending outgoing mail (communication between Kerio MailServer and the relay SMTP server or the target domain's MailServer). This log contains commands and replies of server and client; it can be helpful when you experience problems with email sending.
- Remote POP3 download
- Retrieval of remote POP3 mailboxes (Kerio MailServer in the role of a POP3 client) and sorting rules (when a message is received or downloaded from a remote POP3 mailbox). The Remote POP3 download log together with Alias processing can be helpful when you experience problems with domain mailbox.
- SMTP server session
- Detailed information about communication between clients and the SMTP server. This log can be helpful when you experience problems with MX records.
- POP3 server session
- Detailed information about communication between clients and the POP3 server. Together with IMAP server session and HTTP server session) helps to solve problems with retrieving email from the mailboxes.
- IMAP server session
- Detailed information about communication between clients and the IMAP server as well as information about communication over MAPI interface.
- HTTP server session
- Communication between clients and Kerio MailServer using the Kerio WebMail interface
- LDAP server session
- Detailed monitoring of communication between clients and the LDAP server, and search for contacts in the database.
- Mailing list processing
- Mailing lists monitoring (logins, logouts, message sending, moderators performance, etc.).
- NNTP server session
- A detailed report on communication with the news server.
Advanced section:
- Mail folder operations
- Operations with user and public folders (opening, saving messages, closing)
- Alias processing
- Processing of aliases (during reception of a message or its download from a remote POP3 mailbox) . The Alias processing log is used together with Remote POP3 download to solve problems with domain mailbox sorting.
- Antivirus check processing
- Communication with the antivirus program, processing of individual message attachments. This log can be used if the infected messages are not detected by an antivirus program and are delivered to users.
- Sieve filter processing
- Filtering messages according to user filters
- DNS resolver
- Finding target domain SMTP servers through DNS MX record lookup
- Authentication modules
- External authentication of users (NT domain, Kerberos, PAM)
- Network connections and SSL
- Establishing connections to remote servers (on the TCP level), DNS requests, SSL encrypting, etc.
- Directory service lookup
- Queries to the internal user database (Active Directory). This log can be used in case of problems with import of users from local domains.
- Contacts processing
- Detailed information on contact processing provided in the VCard format.
- Spam filter processing
- Logs the messages with high SpamEliminator rating.
- Update checker activity
- Reports any communication with update.kerio.com, where all new versions of Kerio MailServer are available. From this server, updates of the Kerio Outlook Connector are also downloaded.
