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:
1In Server Admin, select a computer in the Servers list, then select Mail.
2Click Settings.
3Select the General tab.
4Click Enable SMTP.
5Select “Allow incoming mail,” if wanted.
6If you allow incoming mail, enter the domain name to accept mail for and the mail server’s host name.
7Click 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 first 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.
Chapter 2 Mail Service Setup
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