74 lines
2.0 KiB
Bash
Executable File
74 lines
2.0 KiB
Bash
Executable File
#! /bin/sh
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# source: mail.sh
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# Copyright Gerhard Rieger 2001-2009
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# Published under the GNU General Public License V.2, see file COPYING
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#set -vx
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# This is an example for a shell script that can be fed to socat with exec.
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# Its clue is that it does not use stdin/stdout for communication with socat,
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# so you may feed the mail message via stdin to the script. The message should
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# contain appropriate mail headers without continuation lines.
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# socat establishes the connection to the SMTP server; the script performs the
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# SMTP dialog and afterwards transfers the message body to the server.
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# Lines with only a dot are not permitted - use two dots as escape.
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# This script supports multiline answers from server, but not much more yet.
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# Usage: cat message.txt |socat exec:"mail.sh target@domain.com",fdin=3,fdout=4 tcp:mail.relay.org:25,crlf
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while [ "$1" ]; do
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case "$1" in
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-f) shift; mailfrom="$1"; shift;;
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*) break;;
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esac
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done
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rcptto="$1"
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[ -z "$1" ] && rcptto="root@loopback"
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#server=$(expr "$rcptto" : '[^@]*@\(.*\)')
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[ -z "$mailfrom" ] && mailfrom="$USER@$(hostname)"
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# this function waits for a complete server message, checks if its status
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# is in the permitted range (terminates session if not), and returns.
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mail_chat () {
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local cmd="$1"
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local errlevel="$2"; [ -z "$errlevel" ] && errlevel=300
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if [ "$cmd" ]; then echo "> $cmd" >&2; fi
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if [ -n "$cmd" ]; then echo "$cmd" >&4; fi
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while read status message <&3;
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(
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case "$status" in
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[0-9][0-9][0-9]-*) exit 0;;
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[0-9][0-9][0-9]*) exit 1;;
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*) exit 1;;
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esac
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)
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do :; done
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if [ -z "$status" ]; then echo smtp connection failed >&2; exit; fi
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echo "< $status $message" >&2
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if [ "$status" -ge "$errlevel" ]; then
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echo $message >&2
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echo "QUIT" >&4; exit 1
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fi
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}
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# expect server greeting
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mail_chat
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mail_chat "HELO $(hostname)"
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mail_chat "MAIL FROM: $mailfrom"
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mail_chat "RCPT TO: $rcptto"
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mail_chat "DATA" 400
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while read l; do echo "$l" >&4; done
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mail_chat "."
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mail_chat "QUIT"
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exit 0
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