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Operating Systems Linux Red Hat Problems sending mail: Difference between Mail and Mailx? Post 302850403 by MadeInGermany on Wednesday 4th of September 2013 04:07:04 PM
Old 09-04-2013
The -r option is not portable. Maybe on purpose because it's ideal for a spammer.
The default is the user who sends the mail, and the administrator put some rules to generate a sender address out of it. (And that's not safe against a professional spammer either.)
I like the old Unix mail or sendmail tools that do not even know a -s option, and you have to construct the mail header in SMTP style:
Code:
echo "\
Subject: $SUBJECT 
From: $FROM

$MESSAGE
" | mail $RECIPIENTS

NB an empty line indicates the end of the header section.
You can still try that with your advanced mail and mailx programs...
 

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help(1) 						      General Commands Manual							   help(1)

NAME
help - Provides information for new users SYNOPSIS
help DESCRIPTION
The help command presents a one-page display of information for new users. Information is available for the following topics: Concatenat- ing or displaying files Editing lines interactively Sending and receiving mail Reading system messages Changing password file information Identifying current users of the system Sending messages to the other users on the system Displaying the contents of directories Viewing information on the Source Code Control System Setting terminal modes SEE ALSO
Commands: cat(1), ex(1), finger(1), ls(1), mail(1), mailx(1), passwd(1), sccshelp(1), tset(1), who(1), write(1) help(1)
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