Is Sendmail needed? How to configure mailx? MUA & MTA

From: Melissa Young (thesunlover2002@yahoo.com)
Date: Mon Jan 26 2004 - 09:46:06 EST


Hello,

I have some questions about Solaris mail here. Here
are our system policies:

1) All SUN systems are mail clients. The mail server
is MS Exchange.
2) All SUN systems are disallowed to receive emails.
3) All SUN systems need to send emails out among our
LANs (not to the Internet).

On a test system running Solaris 2.6, after I stopped
sendmail daemon, I can still send mail out by using
mailx. I understand some MUA can conduct basic MTA
functions.

My questions:
1) Is sendmail needed to run in such a environment?
(It seems not)
2) As a MUA, how does mailx conduct the MTA functions?
For example, how does mailx recognize DNS without
using MX? Its configuration file /etc/mail/mailx.rc
does not contain much information.

Thank you!
Melissa Young
System Admin

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