An SMTP client. It reads text from standard input and sends it to an SMTP server.

# To send an email using the default account configured in ~/.msmtprc:
echo "Hello world" | msmtp to@example.org

# To send an email using a specific account configured in ~/.msmtprc:
echo "Hello world" | msmtp --account=account_name to@example.org

# To send an email without a configured account. The password should be specified in the ~/.msmtprc file:
echo "Hello world" | msmtp --host=localhost --port=999 --from=from@example.org to@example.org