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Chapter 2 Mail Service Setup 27
Enabling SMTP Access
SMTP is used for transferring mail between Mail service and sending mail from users’
mail clients. The SMTP Mail service stores outgoing mail in a queue until it has found
the mail exchange server at the mail’s destination. Then it transfers the mail to the
destination server for handling and eventual delivery.
SMTP service is required for outgoing Mail service and for accepting delivery of mail
from mail servers outside your organization.
To enable SMTP access:
1 In Server Admin, select a computer in the Servers list, then select Mail.
2 Click Settings.
3 Select the General tab.
4 Click Enable SMTP.
5 Select “Allow incoming mail,” if wanted.
6 If you allow incoming mail, enter the domain name to accept mail for and the mail
server’s host name.
7 Click Save.
By default SMTP is enabled on port 25. If port 25 is blocked in your environment,
you need to change the port SMTP uses.
Requiring SMTP Authentication
If your Mail service requires SMTP authentication, your server cannot be used as an
open relay by anonymous users. Someone who wants to use your server as a relay
point must rst provide the name and password of a user account on your server.
Although SMTP authentication applies primarily to mail relay, your local mail users
must also authenticate before sending mail. This means your mail users must have
mail client software that supports SMTP authentication or they can’t send mail to
remote servers. Mail sent from external mail servers and addressed to local recipients
is still accepted and delivered.
To require SMTP authentication, see “Requiring SMTP Authentication” on page 27.