From nbSMTP manpage: nbSMTP is a lightweight SMTP client. It simply takes a message from STDIN and sends it to a relayhost. A relayhost is meant to be a full SMTP server and it will really send the message.
Install nbSMTP from the AUR: AUR.
Forward to a Gmail Mail Server
To configure nbSMTP, you will have to edit its configuration file (
~/.nbsmtprc) and enter your account settings:
relayhost=smtp.gmail.com port=587 use_starttls=True email@example.com firstname.lastname@example.org auth_pass=myultrasecretpassword
Be careful with permissions on this file, it is recommendable to run this:
chmod 600 ~/.nbsmtprc
To test the configuration, create a file (
To: email@example.com From: firstname.lastname@example.org Subject: nbsmtp test hello email world
and then run:
/usr/bin/nbsmtp < testemail