LinuxCBT Mail Edition focuses on the 3 leading Mail Transfer Agents (MTAs) and ancillary components:
- Sendmail - LinuxCBT Sendmail Edition
- Postfix - LinuxCBT Postfix Edition
- qmail - LinuxCBT qmail Edition.
Linux/UNIX systems are responsible for moving the overwhelming majority of electronic mail across private and public networks. Consequently, savvy Systems Admins. are expected to have a solid foundation in MTAs and ancillary components for general and automated mail-based applications.
Let LinuxCBT Mail Edition help to solidify your understanding of key MTAs and ancillary components.
Recommended Prerequisites:
- Familiarity with electronic mail concepts (MUA/MTA/etc.)
- Access to a GNU/Linux-based PC to install the MTAs and ancillary components used
LinuxCBT Sendmail v8 Edition - Disc 1
- Sendmail - Installation
- Network & systems architecture review
- Download current Sendmail v8.x.x source files
- Import PGP-compatbile public keys
- Verify source archive against imported public keys
- Discuss required applications
- Install GNU C Compiler (GCC) and ancillary applications
- Backup existing Postfix implementation and prepare for Sendmail installation
- Explore Sendmail source tree - identify key components
- Configure & compile Sendmail
- Discuss M4 & CF configuration files (sendmail.{mc,cf}, submit.{mc,cf})
- Discuss default Sendmail operating modes - MSP & MTA
- Prepare default Mail Submission Program (MSP) configuration based on MC
- Prepare default Mail Transfer Agent (MTA) configuration based on MC
- Install Berkeley DB libraries for hashed lookups
- Complete installation
- Explore post-installation Sendmail environment
- Sendmail - Mail Submission Program (MSP) mode
- Discuss local injection of messages
- Explain required Sendmail MSP shell arguments for queue-runner mode
- Start Sendmail in MSP mode
- Verify Operating System (OS) results using BASH exit status
- Verify monitored queue in MSP mode
- Examine resultant Sendmail MSP Process Identification (PID) file creation
- Kill running instance of Sendmail in MSP mode
- Invoke Sendmail queue-runner mode
- Inject test messages into the local queue
- Examine the queue files generated by Sendmail MSP
- Examine Syslog configuration using GREP
- Discuss Sendmail logging
- Identify Sendmail log files
- Examine specific Sendmail log entries using GREP
- Sendmail - Mail Transfer Agent (MTA) mode
- Discuss Sendmail's separation of duties; MSP/MTA
- Explain required shell arguments for Sendmail MTA mode
- Invoke Sendmail in MTA mode running as a daemon
- Confirm Sendmail running in MTA mode
- Force delivery of locally-injected messages
- Confirm delivery of queued messages
- Sendmail - Local Mail
- Discuss Sendmail's local delivery mechanism
- Explore & discuss legacy /var/spool/mail directory
- Identify user mbox files
- Discuss mbox permissions
- Illustrate local mail injection flow
- Use mutt MUA to retrieve locally delivered mail
- Use mutt to reply to envelope sender by local injection using MSP
- Identify local mailer (procmail) used by Sendmail MTA
- Invoke Sendmail in verbose mode
- Attempt delivery to valid and invalid users & examine output
- Explain Sendmail verbose-mode transcript (local vs. remote)
- Sendmail - Logs
- Discuss Syslog semantics (facilities & levels)
- Discuss log rotation
- Examine logs & discuss entries
- Parse logs for interesting entries
- Identify sourced messages
- Discuss record types (receipt vs. delivery attempt(s))
- Follow the message trail based on queue ID
- Explain Sendmail fields
- Identify PID related to various delivery attempts
- Identify total delivery time and transfer time
- Sendmail - Aliases
- Discuss aliases applications
- Identify aliases database
- Explain Sendmail's aliases expansion logic
- Discuss the default aliases - (mailer-daemon, postmaster, etc.)
- Test delivery to defined aliases
- Define additional aliases
- Rebuild aliases database using newaliases to route messages accordingly
- Verify deliverablility of aliases database entries
- Test delivery of messages to newly-defined aliases
- Examine Sendmail logs to view transcript of delivery to aliased user
- Explain the different types of supported Sendmail aliases
- Define lists using aliases - one-to-many mappings
- Test delivery to lists
- Define alias to deliver messages to mbox-compliant file
- Debug I/O errors related to Sendmail's attempt to write to mbox-compliant file
- Implement lists using file system includes
- Define piped aliases to redirect messages to the input stream of other applications
- Implement Sendmail's per-user .forward file for user-based message routing
- Setup aliases using pipes to the vacation program to enable auto-response
- Sendmail - Simple Mail Transfer Protocol (SMTP) Mail
- Discuss SMTP prerequisites
- Examine local name resolution configuration
- Confirm resolution of remote Sendmail server
- Identify available remote recipients
- Compose and deliver message to remote recipient
- Confirm receipt
- Reveal returned message headers using mutt MUA
- Disable message forwarding on remote host
- Confirm receipt of smtp-based messages
- Explain Sendmail's name resolution logic during delivery attempt
- Emulate Sendmail's name resolution logic to illustrate logic
- Demonstrate Sendmail delivering messages based on static HOSTS resolution
- Disable static name resolution for remote host
- Debug message delivery errors related to invalid name resolution
- Create DNS entry for remote server on primary DNS server
- Confirm DNS resolution using system tools
- Confirm mail delivery based on DNS resolution
- Sendmail - Mail Exchange (MX) based messaging
- Explain Sendmail's name resolution logic
- Use system tools to determine MX handler
- Attempt delivery to undefined MX handler
- Update DNS configuration to include MX & A records for second-level domain
- Attempt delivery to defined MX handler
- Confirm delivery based on MX resolution via logs and MUA
- Explain MX distances (priority) field
- Define additional MX host for second-level domain in DNS zone
- Test delivery to backup MX host for failover
- Sendmail - m4 Configuration Technique
- Discuss Sendmail.cf
- Explain advantages of using m4
- Identify m4 templates in Sendmail source tree
- Explain m4 templates hierarchy
- Describe the structure of standard Sendmail m4-compliant files
- Use m4 to generate new Sendmail.cf file
- Increase logging verbosity
- Reload current instance of Sendmail and examine output
- Restrict the number of recipients
- Restrict the size of each message
- Use m4 to generate and test new configuration features
- Sendmail - Masquerading
- Discuss masquerading features and applications
- Explore default Sendmail masquerading configuration using MUA
- Alter Fully Qualified Domain Name (FQDN) of outbound messages using masquerading
- Regenerate Sendmail.cf using m4 technique
- Configure system to receive messages for new FQDN defined using masquerading
- Alter message envelope using masquerading feature
- Add Windows 2003 Host to DNS configuration & confirm resolution
- Masquerade outbound domain to reflect second-level domain
- Sendmail - Relay Control
- Discuss Sendmail's default relay rules
- Configure promiscuous relay & test consequences
- Relay mail to Internet-based host and confirm delivery using SSH
- Restrict relaying by defining relay domains
- Define & test file-based relay domains to permit hosts & subnets to relay
- Recompile Sendmail.mc using m4 technique
- Examine relaying with unresolvable domains
- Confirm relay to Internet-based host using relay domains and Windows 2003 Host
- Discuss benefits of using access db
- Define mc directives for access db invocation
- Create access db file using makemap
- Explore access db directives
- Discuss mailertable feature
- Define mailertable with forced SMTP routes
- Simulate DMZ-based MTA-front-end relaying messages to corporate back-end MTA
- Test results
- Confirm SMTP Auth pre-requisites
- Configure SMTP Auth support
- Recompile Sendmail to support SMTP Auth
- Test relaying from Outlook Express on Windows 2003 Host
- Sendmail - Smart Host Configuration
- Discuss Smart Host applications
- Configure Sendmail to use remote server as a Smart Host
- Rebuild configuration files
- Test local mail routing
- Test smart host routing
- Sendmail - Null Client Configuration
- Discuss Null Client applications
- Undefine Smart Host configuration
- Configure Sendmail as a null client
- Test mail routing as a null client
- Confirm forced SMTP route
- Sendmail - Virtual Domains
- Explain applications
- Define basic-global virtual domains applied to all mailboxes
- Update DNS configuration to route messages to appropriate Virtual Domain server
- Confirm delivery of messages to users at virtual domain
- Add new DNS zone for additional domain to route traffic accordingly
- Discuss virtual user tables applications
- Updated Sendmail.cf to include virtual user tables support
- Define virtual user domains hash
- Define virtual user maps
- Test delivery to various users at various domains
- Define and test a catchall address for a virtual domain
- Rebuild virtual user maps using makemap
- Relay virtual domains to remote recipients
- Sendmail - Malware Framework
- Discuss Malware Framework (MailScanner/ClamAV/SpamAssAssin)
- Dowload MailScanner
- Download Clam Anti-Virus (ClamAV)
- Download SpamAssAssin
- Clam Anti-Virus (ClamAV)
- Install requisite ClamAV components
- Compile & install ClamAV
- Identify key ClamAV binaries
- Update ClamAV configuration files for basic operation
- Update ClamAV definitions
- Invoke ClamAV as a daemon
- SpamAssAssin Installation
- Identify requisite SpamAssAssin components
- Compile & install SpamAssAssin
- Invoke SpamAssAssin as a daemon
- MailScanner Implementation
- Compile & install MailScanner
- Identify MailScanner-related directories
- Explore MailScanner's primary configuration
- Enable ClamAV & SpamAssAssin support
- Alter Sendmail queue configuration to support MailScanner
- Restart Sendmail
- Start MailScanner
- Test message delivery through malware framework
- Test sample Spam through malware framework
- Test sample Virus-laden file through malware framework
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LinuxCBT Postfix Edition - Disc 2
- Postfix - Installation
- Identify a geographically close Postfix mirror location
- Discuss Postfix nomenclature
- Download Postfix
- Import PGP-compatible key to verify downloaded source archive
- Verify Postfix source archive against imported signature
- Extract Postfix source archive
- Identify existing system MTA configuration
- Explore Postfix source tree
- Discuss pre-requisites
- Identify Sendmail-compatible binaries to backup
- Add required Postfix user and groups
- Compile & install Postfix
- Identify key directories and binaries
- Alter key Postfix configuration files for basic operation
- Postfix - Local Mail & Queueing
- Define local domains in main configuration file
- Define Fully Qualified Domain Name (FQDN) of Postfix Host
- Confirm running Postfix TCP (super server) Manager
- Explore current running directives with postconf
- Alter configuration to enable local aliases
- Use sendmail-compatible binary to inject messages into the local queue
- Confirm delivery via default Syslog location
- Identify default mbox-based mailstore
- Use MUA mutt to verify delivery of local mail
- Discuss & explore various Postfix queues
- Explain how Postfix implements local injection
- Explain how Postfix handles SMTP-based mail
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- Postfix - Aliases
- Discuss concepts and applications for aliases
- Identify required aliases
- Describe Sendmail-compatible alias types
- Define 1-to-1 aliases
- Define list-based aliases
- Test aliases delivery
- Discuss per-user aliases (.forward) file
- Define per-user .forward file with redirection to vacation program
- Test delivery and auto-response
- Discuss how mail is routed into the file system (maildrop) while Postfix is up/down
- Identify binaries responsible for local mail injection (pickup/cleanup)
- Postfix - Simple Mail Transfer Protocol (SMTP)
- Confirm the existence of remote recipients
- Inject mail for delivery to remote Linux Host
- Review Postfix delivery report generated upon invocation of verbose mode
- Confirm delivery of remote mail to remote Linux Host
- Use MUA mutt to reveal and explore the headers of SMTP-based mail
- Explore name resolution order file & discuss logic
- Configure Postfix to receive mail to second-level domain plus FQDN
- Simulate Postfix name resolution process at delivery-time
- Expose current Mail Exchanger (MX) Host for the second-level domain
- Postfix - Rewriting Features - Canonical Maps - BCC Maps
- Discuss default configuration
- Examine envelope headers
- Configure Postfix to masquerade outbound messages
- Test masqueraded envelope by generating new mail
- Discuss canonical maps concepts & applications
- Explain corresponding rewrite binaries
- Define canonical maps in Ascii format
- Use Postmap to generate DB-formatted canonical maps
- Instruct main.cf to employ canonical maps database
- Test address rewriting using canonical maps
- Confirm message delivery via Syslog-generated logs
- Examine the headers of delivered message altered using canonical maps & myorigin
- Define & test sender canonical maps
- Define & test recipient canonical maps
- Configure Postfix to BCC all messages to specified recipients
- Test messages between various users to ensure BCC functionality
- Configure Postfix to BCC messages based on specific senders
- Define Sender BCC maps using editor and Postmap to generate Hashed DB
- Postfix - Relay Control
- Explore & discuss default relay behavior
- Identify key relay-related directives
- Connect to remote Windows 2003 Host and attempt to relay
- Confirm DNS resolution of Postfix relay host
- Attempt relay to recipient on relay host & confirm path via logs
- Attempt relay to recipient on foreign host & confirm delivery
- Tighten default Postfix relay policy to restrict relaying to local subnet
- Attempt local subnet and Internet-based relays & confirm results
- Use SMTP commands to expose features supported by Postfix MTA
- Discuss SMTP Auth pre-requisites
- Recompile Postfix to support SMTP Auth
- Configure Postfix with SMTP Auth to restrict relaying by users vs. IP or hostname
- Confirm support of SMTP Auth using standard STMP commands
- Configure Outlook Express client to support SMTP Auth
- Attempt to relay based on SMTP Auth support
- Permit relaying of non-local domains based on relay domains
- Define additional second-level domain for relaying
- Configure relaying of non-local domains using hashed Berkeley DB maps
- Discuss Postfix transport maps concepts and applications
- Define transport maps for domains to bypass DNS MX lookups
- Update receiving Postfix host to support transport maps
- Confirm delivery of messages to additional domains defined in transport maps
- Configure Postfix as a Backup Mail Exchanger (MX) host and confirm delivery during failure
- Postfix - Smart Host & Null Client configuration
- Discuss Smart Host concepts and applications
- Define the Postfix Smart Host
- Define the Postfix Smart Host client
- Test local delivery and confirm delivery
- Test delivery of Internet-based message which requires Smart Host
- Confirm delivery via logs and remote SSH session
- Discuss Null client concepts and applications
- Internet -> DMZ -> Corporate Backbone Mail Repository
- Disable local mail delivery on Postfix host
- Configure Postfix to function as a null client
- Test results of null client delivery
- Postfix - Virtual Domains
- Discuss default domains handled by Postfix
- Attempt IP-address based delivery
- Explore the mydestination parameter
- Alter BIND configuration to route messages for basic virtual domain
- Configure Postfix to map individual users to domains
- Define individual virtual domains hash
- Define virtual domains user hash
- Generate hashed virtual domains and virtual user databases
- Confirm routing of messages to appropriate users
- Define catchall addresses for non-matching users and/or aliases
- Use Postmap to query virtual users and determine delivery path
- Postfix - Mailbox Formats
- Explore default mbox configuration location and permissions
- Describe mbox format
- Explore environment configuration variables related to mail delivery
- Test delivery of mbox-bound messages using mutt & Postfix
- Discuss Maildir message storage format
- Configure Postfix to deliver messages using Maildir message format
- Examine Postfix-created Maildir structure after mail delivery
- Alter shell environment to support Maildir format with desired MUA
- Postfix - Network-based Mail Retrieval
- Discuss Courier IMAP framework
- Identify and install pre-requisites
- Download, compile, and install Courier Authentication Library Daemon
- Identify Courier Authentication key directories, binaries and configuration file
- Download and install Courier IMAP Daemon
- Explore Courier IMAP binary directory tree
- Discuss Courier framework
- Configure Courier for POP3 mail retrieval
- Confirm retrieval using Windows 2003 - Outlook Express client
- Identify POP3 Secure configuration files
- Generate self-signed certificate for use with POP3 Secure communications
- Confirm retrieval of messages using Outlook Expres and POP3 Secure
- Establish run-level symbolic links for POP3 & POP3S services
- Configure Courier for IMAP mail retrieval
- Confirm retrieval using Windows 2003 - Outlook Express client
- Generate self-signed certificate for use with IMAP Secure communications
- Establish run-level symbolic links for IMAP & IMAPS services
- Postfix - Web-based Mail Retrieval
- Discuss Web-based SquirrelMail pre-requisites
- Enable Apache web server
- Download and Install SquirrelMail into web-accessible location
- Secure data and attachments directories
- Configure SquirrelMail for initial use with Courier IMAP
- Address PHP session-related issues
- Explore SquirrelMail from the browser as various Linux users
- Confirm deliver using multiple clients - (mutt/Outlook Express/SquirrelMail/Local Injection)
- Postfix - Malware Framework
- Dowload MailScanner
- Download Clam Anti-Virus (ClamAV)
- Download SpamAssAssin
- Download, compile & install zlib
- Clam Anti-Virus (ClamAV) Implementation
- Create required user and group
- Compile & install ClamAV
- Identify key ClamAV binaries
- Update ClamAV configuration files for basic operation
- Update ClamAV definitions
- Configure system Crontab to update virus definitions every hour
- Confirm scheduled virus definition updates 24 hours later
- SpamAssAssin Implementation
- Illustrate message flow from remote SMTP system through our Malware Framework
- Download SpamAssAssin from Apache Foundation
- Extract & discuss SpamAssAssin source tree
- Compile and install Perl-based SpamAssAssin
- MailScanner Implementation
- Download, compile and install the current MailScanner malware engine
- Explore MailScanner source and binary trees
- Explore MailScanner.conf configuration file - discuss important directives
- Update MailScanner to support Postfix MTA
- Configure Postfix MTA to route inbound messages into temporary queue for processing
- Invoke MailScanner malware engine and confirm
- Debug incidentals related to invalid configuration directives and missing components
- Malware Framework - MUA -> MTA -> MailScanner -> ClamAV -> SpamAassAssin -> MTA -> Maildir/Mailbox
- Send sample malware through the malware framework & confirm detection
- Send sample spam through the malware framework & confirm detection
- Configure MailScanner to affix outbound Corporate Signatures - Legalise - to all messages based trusted configuration
- Postfix - Log Analysis
- Download AWStats log analysis application
- Configure AWStats to function in current Apache Web Server environment
- Discuss AWStats features and applications
- Configure AWStats to process Postfix MTA Logs
- Explore AWStats' web-based interface
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LinuxCBT qmail Edition - Disc 3
- qmail - Installation
- Identify current Mail Transfer Agent (MTA) environment on Red Hat Enterprise box
- Discuss system initialization environment
- Disable current MTA in applicable run-levels
- Identify qmail pre-requisites
- Setup qmail source-tree hierarchy for build process
- Discuss qmail's modular, component architecture - relevant binaries
- Navigate to a close qmail mirror
- Download qmail components
- Extract primary qmail packaged and dicuss contents
- Patch original qmail sources
- Install ucspi-tcp - INETD/XINETD substitute
- Install dameontools - daemon management for qmail daemons
- Create requisite users and groups
- Compile and install qmail
- Define default qmail environment
- Explore and discuss the important qmail directories, symlinks and binaries
- Illustrate internal qmail communications required for local and remote deliveries
- Identify initial qmail startup process
- Define genersal startup scripts for qmail
- Define supervise scripts for qmail delivery
- Define supervise scripts for qmail logging
- Backup default local queue-injection process (Sendmail)
- Create Sendmail symlink to qmail-compatible binary for local queue-injection
- Start qmail & confirm processes and network bindings
- qmail - Local Mail
- Define required system aliases using qmail files
- Configure qmail rules to permit local relaying
- Identify default mbox mail storage format
- Use MUA mutt to deliver mail via qmail
- Examine delivery via qmail logs
- Identify mbox destination
- Discuss local queue-injection logic - qmail-inject/Sendmail
- Explain permissions used by qmail when delivering local mail
- Update local user's environment variables and confirm message delivery
- Identify variables used for local queue-injection
- Explore and discuss the mbox mail storage format
- Update global environment configuration to reflect new mbox storage location
- Examine running qmail statistics
- Inject messages into the queue of a downed MTA
- Examine results
- Explore a message's path throught the local queue
- Resume message delivery
- qmail - Mail Storage Formats
- Switch qmail global configuration from mbox to Maildir storage format
- Use maildirmake to create Maildir-compliant directory structure for users
- Explore standard Maildir directory tree
- Restart qmail and attempt delivery to Maildir mailbox
- Confirm deliver of message to Maildir recipient
- Discuss Maildir file nomenclature
- Update environment variables to reflect Maildir mail storage format
- Explore headers of delivered messages and discuss key components
- qmail - Aliases
- Explain the benefits of aliases
- Explore traditional Sendmail-style aliases in /etc/aliases
- Compare and contrast Sendmail-style aliases to qmail-style (.qmail) aliases
- Discuss key qmail alias user
- Explore system-wide qmail aliases
- Test delivery to system-wide qmail aliases
- Define an abuse qmail-style alias and confirm delivery
- Deine one-to-many qmail-style abuse alias and confirm delivery
- Attempt delivery to non-existing local user or alias using Sendmail and confirm results
- Define a catch-all system-wide alias to handle non-existing local users or accounts
- Test catch-all system-wide alias by injecting messages bound to non-existing mailboxes
- Discuss sub-addresses/address extensions using qmail aliases
- Define sub-address for non-privileged user and confirm delivery using MUA mutt
- Forward defined non-privileged sub-address to other local user and examine results
- Redirect the abuse alias to a Mailbox-style repository for evidence-collection
- Confirm appended alias-redirection of messages destined to catch-all accounts
- qmail - Remote Mail
- Identify key qmail daemons and binaries responsible for remote delivery
- Explain remote delivery logic using DNS
- Connect (SSH) to remote Linux system to be used for initial remote delivery & explore
- Attempt remote delivery using qmail and FQDN of remote box and examine the qmail queue
- Alter remote Postfix environment to find Maildir mailbox and confirm delivery using mutt
- Update remote Postfix configuration to handle messages destined to second-level domain
- Alter remote Postfix transport (smtproutes) file to disable static delivery
- Confirm DNS second-level Mail Exchanger (MX) configuration for linuxcbt.internal domain
- Attempt MX-based delivery and confirm delivery on remote host
- Discuss employed qmail logic
- Switch primary Mail Exchanger (MX) from Postfix box to qmail box - adjusting distances
- Confirm MX distances using Domain Information Groper (dig)
- Attempt delivery to second-level domain from the qmail box & confirm delivery
- Explore qmail log files for message-delivery information
- Debug qmail-smtpd delivery issues and adjust to ensure delivery
- Discuss a Backup MX configuration for a given domain
- Update DNS configuration to reflect the ideal MX distances
- Confirm DNS configuration from a tertiary Linux server
- Purposely fail the primary Postfix server for the linuxcbt.external domain
- Configure qmail to be a Backup MX server for a business partner's domain
- Attempt delivery to the linuxcbt.external domain from the tertiary Linux server
- Examine queued messages for the linuxcbt.external backup domain on the qmail box
- Re-enable the primary domain's Postfix box
- Flush the qmail queue and examine delivery to the primary MX host
- qmail - Relay Control
- Discuss Smart Host applications
- Explore pre-Smart Host SMTP delivery of messages to Internet-based host
- Configure qmail to use a remote Postfix SMTP Smart Host system
- Disable Smart Host configuration
- Discuss qmail's default relay policy
- Identify key qmail configuration files related to relaying
- Attempt to relay from a remote Windows 2003 Host through the open qmail MTA
- Confirm delivery of message via qmail in open-relay mode to local and remote recipients
- Secure open relay and confirm inability to relay messages to untrusted domains
- Configure selective relaying based on individual host and subnet
- Discuss the benefits of SMTP Auth
- Explain qmail's SMTP Auth implementation
- Identify SMTP Auth pre-requisites
- Download, compile and install CheckPassword authentication application
- Debug compilation-related errors
- Download SMTP Auth patch
- Patch qmail sources and recompile to produce modified qmail-smtpd binary
- Install new qmail-smtpd binary and prepare run scripts for usage
- Attempt to relay with tightened relay permissions and confirm failure
- Confirm SMTP Auth from Windows 2003 Host using Outlook Express
- Relay outbound messages using SMTP Auth from Outlook Express client
- qmail - Network-based Mail Retrieval
- Discuss Mail retrieval authentication framework using Courier
- Identify pre-requisites
- Download, compile and install Courier Authentication Daemon
- Identify Courier Authentication key directories, binaries and configuration file
- Download and install Courier IMAP Daemon
- Explore Courier IMAP binary directory tree
- Discuss Courier framework
- Configure Courier for POP3 mail retrieval
- Confirm retrieval using Windows 2003 - Outlook Express client
- Identify POP3 Secure configuration files
- Generate self-signed certificate for use with POP3 Secure communications
- Confirm retrieval of messages using Outlook Expres and POP3 Secure
- Establish run-level symbolic links for POP3 & POP3S services
- Configure Courier for IMAP mail retrieval
- Confirm retrieval using Windows 2003 - Outlook Express client
- Generate self-signed certificate for use with IMAP Secure communications
- Establish run-level symbolic links for IMAP & IMAPS services
- qmail - Web-based Mail Retrieval
- Discuss Web-based SquirrelMail pre-requisites
- Enable Apache web server
- Download and Install SquirrelMail into web-accessible location
- Secure data and attachments directories
- Configure SquirrelMail for initial use with Courier IMAP
- Address PHP session-related issues
- Explore SquirrelMail from the browser as various Linux users
- Confirm deliver using multiple clients - (mutt/Outlook Express/SquirrelMail/Local Injection)
- qmail - Virtual Domains
- Discuss qmail virtual domains support via system-wide aliases
- Configure basic/global virtual domains using .qmail files
- Confirm delivery to users @ virtual domains
- Configure individual virtual domains
- Confirm delivery to individuals @ virtual domains
- Ensure non-global delivery to virtual domains
- Define non-privileged user-managed virtual domains
- Confirm deliver to user-managed virtual domains
- qmail - Malware Framework - OpenProtect, Bad Senders, TLS
- Discus the OpenProtect Malware Framework
- Identify pre-requisites
- Download OpenProtect
- Install Open Protect
- Explore OpenProtect Configuration (MailScanner/ClamAV/SpamAssAssin)
- Configure outbound signatures
- Configure qmail to reject users based header information
- Confirm rejection from Windows 2003 Host - Outlook Express
- Discuss Transport Layer Security framework and requirements
- Implement Transport Layer Security (TLS)
- Configure Outlook Express client to use TLS & test outbound relaying
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