Apple Mac OS X Server Version 10.4 or Later Manual do Utilizador Página 16
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16 Chapter 1 Mail Service Setup
Mail Service Protocols
A standard mail client setup uses SMTP to send outgoing email, and POP and IMAP to
receive incoming email. Mac OS X Server includes an SMTP service and a combined
POP and IMAP service. You may find it helpful to take a closer look at the three email
protocols.
Outgoing Mail
Outgoing mail service is the means by which your users can send mail out to the
Internet. Subject to restrictions that you control, the SMTP service also transfers mail to
and from mail service on other servers. If your mail users send messages to another
Internet domain, your SMTP service delivers the outgoing messages to the other
domain’s mail service.
Simple Mail Transfer Protocol (SMTP)
SMTP is a protocol used to send and transfer mail. SMTP queues outgoing mail
messages from the user. These messages are transferred along the Internet to their
destinations, to be picked up by the incoming mail protocols.
Mac OS X Server uses Postfix as its mail transfer agent (MTA). Postfix fully supports the
Internet standard SMTP protocol. Your email users will set their email applications’
outgoing mail server to your Mac OS X Server running Postfix, and access their own
incoming mail from a Mac OS X Server running incoming mail service. More
information on Postfix can be found at:
www.postfix.org
If you choose to use another MTA (such as Sendmail), you won’t be able to configure
your mail service with Mac OS X Server administration tools.
If you want to use the Sendmail program instead of Postfix, you must disable the
current SMTP service through Postfix, then install and configure Sendmail. For more
information about Sendmail, see the website www.sendmail.org.
Incoming Mail
Mail is transferred from incoming mail storage to the email recipient’s inbox by a local
delivery agent (LDA). The LDA is responsible for handling local delivery, making mail
accessible by the user’s email application. There are two different protocols available
from Mac OS X Server’s mail access agent: POP and IMAP.
Mac OS X Server uses Cyrus to provide POP and IMAP service. More information about
Cyrus can be found at:
asg.web.cmu.edu/cyrus
- Mac OS X Server 1
- Contents 3
- Glossary 101 7
- Index 111 7
- About This Guide 9
- Using Onscreen Help 10
- The Mac OS X Server Suite 11
- Getting Documentation Updates 12
- Mail Service Setup 15
- Mail Service Protocols 16
- Where Mail Is Stored 18
- Using Web Service with Mail 19
- How Mail Service Uses SSL 22
- Before You Begin 23
- Setup Overview 24
- Enabling POP Access 26
- Enabling IMAP Access 27
- Enabling SMTP Access 32
- Supporting Mail Users 37
- Running a Virtual Host 41
- Managing Mail Quotas 44
- Configuring Quota Warnings 45
- Connection Control 46
- Filtering SMTP Connections 49
- Email Screening 49
- Sieve Scripting Support 54
- Mail Service Maintenance 57
- Holding Outbound Mail Service 58
- Reloading Mail Service 59
- Improving Performance 59
- Repairing the Mail Database 60
- Monitoring Mail Service 65
- Viewing Mail Accounts 67
- Viewing Mail Service Logs 67
- • Low (errors only) 68
- • High (all events) 68
- Dealing With a Full Disk 69
- Internet 72
- Mailing Lists 73
- Setting Up a Mailing List 74
- Creating a New Mailing List 75
- 76 Chapter 3 Mailing Lists 76
- Chapter 3 Mailing Lists 77 77
- 78 Chapter 3 Mailing Lists 78
- Chapter 3 Mailing Lists 79 79
- Administering Mailing Lists 80
- Chapter 3 Mailing Lists 81 81
- 82 Chapter 3 Mailing Lists 82
- Designating a List Moderator 83
- Archiving a List’s Mail 83
- Viewing Mailing List Archives 84
- Removing a List Subscriber 85
- Suspending a Subscriber 85
- List Subscriber’s Options 86
- Chapter 3 Mailing Lists 87 87
- 88 Chapter 3 Mailing Lists 88
- Disabling List Mail Delivery 89
- Toggling Digest Mode 89
- • Email address 90
- • Name on the list 90
- • Posting acknowledgments 90
- • Message copy handling 90
- Chapter 3 Mailing Lists 91 91
- Certificates and Security 93
- Public and Private Keys 94
- Certificates 94
- Certificate Authorities (CA) 95
- Identities 95
- Self-Signed Certificates 95
- Readying Certificates 96
- Managing Certificates 98
- Using The Certificates 99
- Glossary 101
- 102 Glossary 102
- Glossary 103 103
- 104 Glossary 104
- Glossary 105 105
- 106 Glossary 106
- Glossary 107 107
- 108 Glossary 108
- Glossary 109 109
- 112 Index 112
- Index 113 113
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