Apple Mac OS X Server Version 10.4 or Later Manual de usuario Pagina 48
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48 Chapter 1 Mail Service Setup
Rejecting SMTP Connections From Specific Servers
Your mail service can reject unauthorized SMTP connections from hosts on a
disapproved-hosts list that you create. All mail traffic from servers in this list is denied
and the SMTP connections are closed after posting a 554 SMTP connection refused
error.
To reject unauthorized SMTP connections from specific servers:
1 In Server Admin, select Mail in the Computers & Services pane.
2 Click Settings.
3 Select the Relay tab.
4 Check “Refuse all messages from these...”.
5 Edit the list of servers.
Click the Add (+) button to add a host to the list.
Click the Remove (-) button to delete the currently selected host from the list.
Click the Edit (/) button to change the currently selected host from the list.
When adding to the list, you can use a variety of notations.
• Enter a single IP address, or the network/netmask pattern such as 192.168.40.0/21.
• Enter a host name, such as mail.example.com.
• Enter an Internet domain name, such as example.com.
Rejecting Mail From Blacklisted Senders
Your mail service can reject mail from SMTP servers that are blacklisted as open relays
by a Real-time Blacklist Server (RBL). Your mail service uses an RBL server that you
specify. RBLs are sometimes called black-hole servers.
Important: Blocking unsolicited mail from blacklisted senders may not be completely
accurate. Sometimes it can prevent valid mail from being received.
To reject mail from blacklisted senders:
1 In Server Admin, select Mail in the Computers & Services pane.
2 Click Settings.
3 Select the Relay tab.
4 Check “Use these junk mail rejection servers.”
5 Edit the list of servers by adding the DNS name of an RBL server.
Click the Add (+) button to add a server to the list.
Click the Remove (-) button to delete the currently selected server from the list.
Click the Edit (/) button to change the currently selected server from the list.
Enter the domain name of the desired RBL server, such as rbl.example.com.
- 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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