03-14-2017
Hi,
In RHEL/CentOS 7, the default mail server (MTA) is Postfix rather than Sendmail. Sendmail is certainly still available as a supported and installable alternative via yum, but unless you absolutely need Sendmail for a particular purpose, Postfix is probably the way to go. Certainly if all you want is for the server to be able to send SMTP mail, then the Red Hat default choices should be fine.
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LEARN ABOUT SUNOS
praliases
praliases(1) User Commands praliases(1)
NAME
praliases - display system mail aliases
SYNOPSIS
praliases [-C configfile] [-f aliasfile] [key]
DESCRIPTION
The praliases utility displays system mail aliases. When no key is given, praliases displays the current system aliases, one per line, in
no particular order. The form is key:value. If a key is given, only that key is looked up and the appropriate key:value is displayed if
found.
OPTIONS
The following options are supported:
-C configfile Specifies a sendmail configuration file.
-f aliasfile Reads the specified file aliasfile instead of the default sendmail system aliases file.
OPERANDS
The following operands are supported:
key A specific alias key to look up.
EXIT STATUS
The following exit values are returned:
0 Successful operation.
>0 An error occurred.
FILES
/etc/mail/aliases Default sendmail system aliases file
/etc/mail/aliases.db Database versions of the /etc/mail/aliases file
/etc/mail/aliases.dir Database versions of the /etc/mail/aliases file
/etc/mail/aliases.pag
/etc/mail/sendmail.cf Default sendmail configuration file
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsndmu |
+-----------------------------+-----------------------------+
SEE ALSO
mailq(1), newaliases(1M), sendmail(1M), attributes(5)
SunOS 5.10 29 Mar 2004 praliases(1)