Nothing happens when sending a mail with (command line) sendmail

emailemail-servermailboxpostfixsendmail

I want to set a mail server that can send mail with sendmail. Here is what I have done exactly

 service postfix start
 sendmail < mymail

where mymail contains

to:my@mail.com
from:random@mail.com
subject: None
None

With a packet capture, I see that nothing is sent. postfix is running on port 25 and I haven't touch the configuration after postfix installation.

Why is the mail not sent and how can I send a mail with sendmail?

Best Answer

1) Instruct sendmail to look for recipients in message headers (-t) and ignore single dot line as end of email (-i). Without -t sendmail expects to get recipients' list via command line.

sendmail -i -t < mymail

2) Insert empty line between headers and body in the message (mymail file)

to:my@mail.com
from:random@mail.com
subject: None

None

Postfix manual sendmail(1)

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