From: Brian Candler <b.candler@...>
Date: 2010-05-02T21:35:21+09:00
Subject: Re: Sendmail, semicolons and new lines

Toby Rodwell wrote:
> I focused my attention on the file I'm 
> feeding into Sendmail, and whilst I don't pretend to understand it, I 
> find if I add two newlines ("\n\n") before my list of lines ending in 
> semicolons then it works as desired.

Ah. An E-mail message consists of headers and a body, and they are 
separated by a blank line (see RFC 2822 for the full details)

So if you want to send an E-mail and don't want to specify any headers, 
you need a blank line at the top. An E-mail like that is invalid, so 
sendmail will add a minimal set of headers for you anyway (e.g. To: is 
the recipient(s) you provided on sendmail command line, From: is the 
user who submitted the message)

It's better to provide the headers explicitly, and if you use sendmail 
-t then the recipients are taken from the To:/Cc:/Bcc: headers that you 
provide, so you don't need to provide them on the sendmail command line.

Regards,

Brian.
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