Using telnet to send test emails over smtp fails when using stdin-redirection (pipes or heredocs)

Solution Verified - Updated -

Issue

  • I'm using a script that tests smtp email connectivity. The script uses the telnet command and worked in HP-UX but I can't get it to work in RHEL ... it always fails.

    telnet mailserver 25 <<EOF
HELO        xxxx
MAIL FROM:  xxxx
RCPT TO:    xxxx
SUBJECT:    xxxx
DATA
From:       xxxx
To:         xxxx
Subject:    xxxx
xxxxx (body here) xxxx
.
QUIT
EOF

Environment

  • Red Hat Enterprise Linux
  • telnet command

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