Using Network Services with Mail Service | Apple 10.6 guide

Using Network Services with Mail Service

Mail service makes use of network services to ensure delivery of mail. Before sending mail, your Mail service will probably have a DNS service determine the Internet Protocol (IP) address of the destination.

The DNS service is necessary because people typically address their outgoing mail by using a domain name, such as example.com, rather than an IP address, such as 198.162.12.12. To send an outgoing message, Mail service must know the IP address of the destination.

Mail service relies on a DNS service to look up domain names and determine the corresponding IP addresses. The DNS service can be provided by your Internet Service Provider (ISP) or by Mac OS X Server, as explained in Network Services Administration.

Additionally, a mail exchange (MX) record can provide redundancy by listing an alternate mail host for a domain. If the primary mail host isn’t available, the mail can be sent to the alternate mail host. An MX record can list several mail hosts, each with a priority number. If the lowest priority host is busy, mail can be sent to the host with the next lowest priority, and so on.

Without a properly configured MX record in DNS, mail might not reach your intended server.

Mail service uses DNS like this:

1The sending server reads the mail recipient’s domain name (what comes after the @ in the To address).

2The sending server looks up the MX record for that domain name to find the receiving server.

3If the MX record is found, the message is sent to the receiving server.

4If the lookup fails to find an MX record for the domain name, the sending server assumes that the receiving server has the same name as the domain name, so the sending server does an Address (A) lookup on that domain name and attempts to send the file there.

To configure DNS, see “Configuring DNS for Mail Service” on page 21.

Chapter 1    Understanding Mail Service

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Apple 10.6 manual Using Network Services with Mail Service, Mail service uses DNS like this

Contents

Mac OS X Server Apple Contents Mail Service Advanced Configuration Troubleshooting Mail Service Monitoring and Maintaining Mail Service Contents Preface What’s in This Guide To get the most recent onscreen help for Mac OS X Server Using Onscreen HelpTo see the most recent server help topics Getting Started Document Road Map Preface About This Guide Getting Additional Information Getting Documentation Updates Mail Service Architecture Understanding Mail Service Mac OS X Server Mail Transfer Agent Mail Screening Outgoing Mail Location Where Mail Is StoredIncoming Mail Location Local Delivery Agent Internet Message Access Protocol ImapDovecot Post Office Protocol POP User Interaction with Mail Service Mailman-Based Mailing Lists Using Mailing Lists with Mail ServiceWiki-Based Mailing Lists Mail service uses DNS like this Using Network Services with Mail Service Before You Begin Managing Mail Service Configuring DNS for Mail Service Using Mail Service ToolsTo enable MX records How User Account Settings Affect Mail Service Setup Overview Configure outgoing Mail service To start the mail configuration assistant Configure additional settings for Mail service To change Mail service settings from the command line Administering Mail ServiceChanging Mail Service Settings To enable Mail Service for administration Understanding Smtp Authentication General SetupViewing Mail Service Settings from the Command Line Configuring Outgoing Mail Service To enable Smtp access Enabling Smtp AccessRequiring Smtp Authentication To keep a copy of undeliverable incoming mail Relaying Smtp Mail Through Another ServerTo relay Smtp mail through another server Copying Undeliverable Incoming Mail To save all messages Configuring Incoming Mail ServiceEnabling Imap Access Saving Mail Messages for Monitoring and Archival Purposes Choosing No Incoming Mail Retrieval To enable Imap accessEnabling POP Access To enable POP access To change the local delivery directory Restricting Smtp RelayTo restrict Smtp relay Rejecting Smtp Connections from Specific Servers Restricted Smtp Relay and Smtp Authentication Interaction To filter Smtp connections Rejecting Mail from Blacklisted SendersFiltering Smtp Connections To reject mail from blacklisted senders Connection Control Limiting Junk Mail and Viruses To enable junk mail screening Mail Service FilteringEnabling Junk Mail Screening Bayesian Filters Training the junk mail filter with users’ help Training the Junk Mail Filter Filtering Mail by Language and Locale Training the junk mail filter without user interactionTo allow mail by language and locale Enabling Virus Screening To enable virus screening From the command line To enable Sieve supportServer-Side Mail Rules Enabling Mail Quotas for Users To enable a user’s mail quotaManaging Mail Quotas Limiting Incoming Message Size To configure quota violation responses Configuring Quota WarningsConfigure Quota Violation Responses To configure quota warnings To enable wiki-based mailing lists Setting Up a Wiki-Based Mailing ListMailing Lists About Mailman To enable mailing lists Setting Up a Mailman Mailing ListEnabling Mailing Lists To create a list Creating a Mailing List To create a list description Setting a List’s Maximum Message LengthTo set a list’s maximum message length Creating a Mailing List Description To customize the subscriber welcome message Customizing the Mailing List Welcome MessageTo customize a welcome message Customizing the Mailing List Unsubscribe Message To set bounce options To enable list moderationSetting Mailing List Message Bounce Options Enabling a Mailing List Moderator To add subscribers Designating a Mailing List as PrivateTo set privacy options Adding Subscribers Viewing a Mailing List’s Information Administering Mailing ListsViewing a Server’s Mailing Lists To see the lists To access a list’s web-based options Designating a List AdministratorTo designate a list administrator Accessing Web-Based Administrator Options To archive a list’s mail Designating a List ModeratorTo designate a list moderator Archiving a List’s Mail Removing a List Subscriber Working with Mailing List SubscribersViewing Mailing List Archives Adding a Subscriber to a List To suspend a user’s subscription to a list Changing Subscriber Posting PrivilegesTo add or remove a subscriber’s posting privileges Suspending a Subscriber Subscribing to a Mailing List Via Web List Subscriber OptionsSubscribing to a Mailing List Via Mail To subscribe via mail Unsubscribing from a Mailing List Via Mail Setting and Changing Your Mailing List PasswordUnsubscribing from a Mailing List Via Web To toggle digest mode To disable list deliveryChanging Digest Mode Disabling List Mail Delivery Choosing Mime or Plain Text Digests Where to Find More InformationSetting Additional Subscriber Options To access additional options To set the Mail service log detail Setting Mail Service Logging OptionsSetting the Mail Service Log Detail Archiving Mail Service Logs by Schedule Configuring Mail Client Applications Client-Specific Configuration for Mail Service How a user modifies their vacation notices Using WebmailVacation Notices To use WebMail Securing User Access to Mail Service Use this chapter to tune Mail service beyond a basic setupDesignating Authorized Mail Service Users Using Access Control Lists for Mail Service Access Using Workgroup Manager for Mail Service AccessTo enable a user’s mail access using Workgroup Manager Smtp Authentication Choosing Authentication for Mail ServiceTo enable mail access using ACLs To allow secure Smtp authentication Imap and POP AuthenticationTo allow less secure authentication To set less secure Imap and POP authentication To set secure Imap and POP authentication Configuring SSL for mail transport Securing Mail Service with SSL To configure SSL transport for Imap and POP connections Configuring SSL Transport for Smtp ConnectionsConfiguring SSL Transport for Imap and POP Connections To configure SSL transport for Smtp connections Enter a key size, and then press Return Generate a Certificate Signing Request CSR Enter s, and then press Return Following output appears Accessing Server Certificates from the Command Line Creating the Password File in the Keychain Creating a Password File from the Command Line To enable virtual hosting Mail Service Virtual HostEnabling Virtual Hosting Associating Users to the Virtual Host Adding or Removing Virtual HostsTo add or remove virtual hosts Postmaster@server.com At the prompt, enter the following command To create a Mac OS X Server-style alias Creating Additional Mail Addresses for Users To create a Postfix-style alias Setting Up Forwarding Mail Addresses for a UserTo forward a user’s mail Specifying the Location of the Mail Store Working with Mail Service Data StorageTo specify where mail is stored on the server Viewing the Location of the Mail Store To split the mail store Creating Additional Mail Store Locations Backing Up and Restoring Mail Messages Maximum Number of Mail Messages Per Volume To disable the default conversion Setting Up Mail Server Clustering with XsanConfiguring Additional Mail Service Support for 8-Bit Mime Configuring Mail Clustering Starting or Stopping Mail Service Use this chapter to monitor and maintain Mail serviceTo start or stop the service To hold outbound mail Reloading Mail ServiceTo reload Mail service from the command line Holding Outbound Mail Blocking Inbound Mail Connections Allowing Administrator Access to Mail FoldersCreating an Administration Account To create a mail administrator account To see an overview of Mail service activity Monitoring Mail Service ActivityViewing an Overview of Mail Service Activity Viewing Mail Service Logs To view a list of connected mail users To view a Mail service logReclaiming Disk Space Used by Mail Service Log Archives Viewing the Mail Connections List Clearing Messages from the Outgoing Mail Queue Viewing Mail AccountsMonitoring the Outgoing Mail Queue Checking the Outgoing Mail Queue Retrying Undelivered Outgoing Messages Viewing Mail Service StatisticsTo try to resend an outgoing message Computer responds with the following output Improving Performance Troubleshooting Mail Service Forwarding Undeliverable Incoming Mail When a Disk Is FullWhen Mail Is Undeliverable Where to Find More Information Internet Books Appendix Service Settings D87.cert.pem Mailimapsieveproxyservers Emptyarray D87.key.pem Default ALL+RC4@STRENGTH 100 Mailpostfixsendercanonicalmaps 101 102 103 Strength 104 ALL!EXPORT+RC4@STRENGTH 105 106 Mailpostfixdisablemimeinput Processing 107 Begin Certificate 108 109 110 111 112 Options 113 Connect GET Post 114 115 116 117 118 119 120 121 TZ Mailconfig Lang 122 123 Begin RSA Private KEY 124 MAILER-DAEMON 125 Ratedelay Mailpostfixsmtprandomize Yes Addresses 126 127 128 Vacation Notification Script Basic Sort and Antijunk Mail Filter Self-Defined Forwarding129 130 Disks Index131 132 133 See also Mailman, subscribers Mailman 134