Apple Mac OS X Server Migration For Version 10.3 or Later Manuel d'utilisateur télécharger pdf (Page 10)

10 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 (www.postfix.org) as its mail transfer agent (MTA). Postfix

fully supports the Internet standard SMTP protocol. Your email users will set their email

applications’s 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.

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 current

SMTP service through Postfix, and then install and configure Sendmail. For more

information about Sendmail, see the web site 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 (asg.web.cmu.edu/cyrus) to provide POP and IMAP service.

Post Office Protocol (POP)

POP is used only for receiving mail, not for sending mail. The mail service of Mac OS X

Server stores incoming POP mail until users have their computers connect to the mail

service and download their waiting mail. After a user’s computer downloads POP mail,

the mail is stored only on the user’s computer. The user’s computer disconnects from

the mail service, and the user can read, organize, and reply to the received POP mail.

The POP service is like a post office, storing mail and delivering it to a specific address.

LL2349.Book Page 10 Friday, August 22, 2003 2:47 PM

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 56 57

Pas de commentaire

Apple Mac OS X Server Migration For Version 10.3 or Later Manuel d'utilisateur Page 10