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Apple 10.6 manual Understanding Mail Service, Mail Service Architecture

Models: 10.6

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Understanding Mail Service	1

Mail service in Mac OS X Server is comprised of many different components that work together to provide incoming and outgoing Mail service, mail filtering, and mailing lists.

This chapter begins with a look at the standard protocols used for sending and receiving mail. Then it explains how Mail service works, discusses mailing lists, and concludes with information on how Mail service integrates with other network services.

Mail Service Architecture

Mail service in Mac OS X Server allows network users to send and receive mail over your network or across the Internet.

Mail service sends and receives mail using the following standard Internet mail protocols: ÂÂ Simple Mail Transfer Protocol (SMTP)

ÂÂ Internet Message Access Protocol (IMAP)

ÂÂ Post Office Protocol (POP)

A standard mail client setup uses SMTP to send outgoing mail and POP and IMAP to receive incoming mail. Mac OS X Server includes an SMTP service and a combined POP and IMAP service.

Mail service also uses a Domain Name System (DNS) service to determine the destination IP address of outgoing mail.

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Apple 10.6 manual Understanding Mail Service, Mail Service Architecture

Contents

Mac OS X Server Apple Contents Mail Service Advanced Configuration Monitoring and Maintaining Mail Service Troubleshooting Mail ServiceContents What’s in This Guide PrefaceUsing Onscreen Help To get the most recent onscreen help for Mac OS X ServerTo see the most recent server help topics Document Road Map Getting StartedPreface About This Guide Getting Documentation Updates Getting Additional InformationUnderstanding Mail Service Mail Service ArchitectureMail Transfer Agent Mac OS X ServerMail Screening Where Mail Is Stored Outgoing Mail LocationIncoming Mail Location Internet Message Access Protocol Imap Local Delivery AgentDovecot User Interaction with Mail Service Post Office Protocol POPUsing Mailing Lists with Mail Service Mailman-Based Mailing ListsWiki-Based Mailing Lists Using Network Services with Mail Service Mail service uses DNS like thisManaging Mail Service Before You BeginUsing Mail Service Tools Configuring DNS for Mail ServiceTo enable MX records Setup Overview How User Account Settings Affect Mail ServiceTo start the mail configuration assistant Configure outgoing Mail serviceConfigure additional settings for Mail service Administering Mail Service Changing Mail Service SettingsTo enable Mail Service for administration To change Mail service settings from the command lineGeneral Setup Viewing Mail Service Settings from the Command LineConfiguring Outgoing Mail Service Understanding Smtp AuthenticationEnabling Smtp Access To enable Smtp accessRequiring Smtp Authentication Relaying Smtp Mail Through Another Server To relay Smtp mail through another serverCopying Undeliverable Incoming Mail To keep a copy of undeliverable incoming mailConfiguring Incoming Mail Service Enabling Imap AccessSaving Mail Messages for Monitoring and Archival Purposes To save all messagesTo enable Imap access Enabling POP AccessTo enable POP access Choosing No Incoming Mail RetrievalRestricting Smtp Relay To change the local delivery directoryTo restrict Smtp relay Restricted Smtp Relay and Smtp Authentication Interaction Rejecting Smtp Connections from Specific ServersRejecting Mail from Blacklisted Senders Filtering Smtp ConnectionsTo reject mail from blacklisted senders To filter Smtp connectionsLimiting Junk Mail and Viruses Connection ControlMail Service Filtering To enable junk mail screeningEnabling Junk Mail Screening Bayesian Filters Training the Junk Mail Filter Training the junk mail filter with users’ helpTraining the junk mail filter without user interaction Filtering Mail by Language and LocaleTo allow mail by language and locale To enable virus screening Enabling Virus ScreeningTo enable Sieve support From the command lineServer-Side Mail Rules To enable a user’s mail quota Managing Mail QuotasLimiting Incoming Message Size Enabling Mail Quotas for UsersConfiguring Quota Warnings Configure Quota Violation ResponsesTo configure quota warnings To configure quota violation responsesSetting Up a Wiki-Based Mailing List To enable wiki-based mailing listsMailing Lists About Mailman Setting Up a Mailman Mailing List To enable mailing listsEnabling Mailing Lists Creating a Mailing List To create a listSetting a List’s Maximum Message Length To set a list’s maximum message lengthCreating a Mailing List Description To create a list descriptionCustomizing the Mailing List Welcome Message To customize a welcome messageCustomizing the Mailing List Unsubscribe Message To customize the subscriber welcome messageTo enable list moderation Setting Mailing List Message Bounce OptionsEnabling a Mailing List Moderator To set bounce optionsDesignating a Mailing List as Private To set privacy optionsAdding Subscribers To add subscribersAdministering Mailing Lists Viewing a Server’s Mailing ListsTo see the lists Viewing a Mailing List’s InformationDesignating a List Administrator To designate a list administratorAccessing Web-Based Administrator Options To access a list’s web-based optionsDesignating a List Moderator To designate a list moderatorArchiving a List’s Mail To archive a list’s mailWorking with Mailing List Subscribers Viewing Mailing List ArchivesAdding a Subscriber to a List Removing a List SubscriberChanging Subscriber Posting Privileges To add or remove a subscriber’s posting privilegesSuspending a Subscriber To suspend a user’s subscription to a listList Subscriber Options Subscribing to a Mailing List Via MailTo subscribe via mail Subscribing to a Mailing List Via WebSetting and Changing Your Mailing List Password Unsubscribing from a Mailing List Via MailUnsubscribing from a Mailing List Via Web To disable list delivery Changing Digest ModeDisabling List Mail Delivery To toggle digest modeWhere to Find More Information Setting Additional Subscriber OptionsTo access additional options Choosing Mime or Plain Text DigestsSetting Mail Service Logging Options Setting the Mail Service Log DetailArchiving Mail Service Logs by Schedule To set the Mail service log detailClient-Specific Configuration for Mail Service Configuring Mail Client ApplicationsUsing Webmail Vacation NoticesTo use WebMail How a user modifies their vacation noticesUse this chapter to tune Mail service beyond a basic setup Securing User Access to Mail ServiceDesignating Authorized Mail Service Users Using Workgroup Manager for Mail Service Access Using Access Control Lists for Mail Service AccessTo enable a user’s mail access using Workgroup Manager Choosing Authentication for Mail Service Smtp AuthenticationTo enable mail access using ACLs Imap and POP Authentication To allow secure Smtp authenticationTo allow less secure authentication To set secure Imap and POP authentication To set less secure Imap and POP authenticationSecuring Mail Service with SSL Configuring SSL for mail transportConfiguring SSL Transport for Smtp Connections Configuring SSL Transport for Imap and POP ConnectionsTo configure SSL transport for Smtp connections To configure SSL transport for Imap and POP connectionsGenerate a Certificate Signing Request CSR Enter a key size, and then press ReturnEnter s, and then press Return Following output appears Accessing Server Certificates from the Command Line Creating a Password File from the Command Line Creating the Password File in the KeychainMail Service Virtual Host To enable virtual hostingEnabling Virtual Hosting Adding or Removing Virtual Hosts Associating Users to the Virtual HostTo add or remove virtual hosts Postmaster@server.com At the prompt, enter the following command Creating Additional Mail Addresses for Users To create a Mac OS X Server-style aliasSetting Up Forwarding Mail Addresses for a User To create a Postfix-style aliasTo forward a user’s mail Working with Mail Service Data Storage To specify where mail is stored on the serverViewing the Location of the Mail Store Specifying the Location of the Mail StoreCreating Additional Mail Store Locations To split the mail storeMaximum Number of Mail Messages Per Volume Backing Up and Restoring Mail MessagesSetting Up Mail Server Clustering with Xsan Configuring Additional Mail Service Support for 8-Bit MimeConfiguring Mail Clustering To disable the default conversionUse this chapter to monitor and maintain Mail service Starting or Stopping Mail ServiceTo start or stop the service Reloading Mail Service To reload Mail service from the command lineHolding Outbound Mail To hold outbound mailAllowing Administrator Access to Mail Folders Creating an Administration AccountTo create a mail administrator account Blocking Inbound Mail ConnectionsMonitoring Mail Service Activity Viewing an Overview of Mail Service ActivityViewing Mail Service Logs To see an overview of Mail service activityTo view a Mail service log Reclaiming Disk Space Used by Mail Service Log ArchivesViewing the Mail Connections List To view a list of connected mail usersViewing Mail Accounts Monitoring the Outgoing Mail QueueChecking the Outgoing Mail Queue Clearing Messages from the Outgoing Mail QueueViewing Mail Service Statistics Retrying Undelivered Outgoing MessagesTo try to resend an outgoing message Computer responds with the following output Troubleshooting Mail Service Improving PerformanceWhen a Disk Is Full When Mail Is UndeliverableWhere to Find More Information Forwarding Undeliverable Incoming MailBooks InternetService Settings AppendixD87.cert.pem Mailimapsieveproxyservers Emptyarray D87.key.pem Default ALL+RC4@STRENGTH 100 101 Mailpostfixsendercanonicalmaps102 Strength 103ALL!EXPORT+RC4@STRENGTH 104105 Mailpostfixdisablemimeinput Processing 106Begin Certificate 107108 109 110 111 Options 112Connect GET Post 113114 115 116 117 118 119 120 TZ Mailconfig Lang 121122 Begin RSA Private KEY 123MAILER-DAEMON 124Ratedelay Mailpostfixsmtprandomize Yes Addresses 125126 127 Vacation Notification Script 128Self-Defined Forwarding Basic Sort and Antijunk Mail Filter129 130 Index Disks131 132 See also Mailman, subscribers Mailman 133134