I would like to use sendmail to send an e-mail from my backup software on Kubuntu Linux. However the software does not allow entering a full command line (only command name and arguments pattern separately). This is why I can not pass the mail body to sendmail using standard input.

Is there a way to call sendmail without standard input usage? E.g. passing the message body by command line parameter (or even passing no body at all)?

  • You can probably get stdin to "work" this way: by spawning a shell with the redirections inside the argument:sh -c 'sendmail -oi -t < file.eml' – glenn jackman Oct 11 '15 at 11:22

Sure, write a shellscript that does so.

sendmail -i "silicomancer@example.com" <<EOF
Date: ...
From: ...
To: ...
Subject: ...
Content-Type: text/plain; charset=utf-8

Yo, stuff happened ($*).

Though it might be better to use mail (aka Mail or mailx or s-nail) than hand-craft all the headers.

  • The script is an interesting idea. However using an alternate mail program actually seems the better solution. 'sendemail' works like a charm for me. – Silicomancer Oct 11 '15 at 10:58

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