msmtp

An SMTP client. It reads text from stdin and sends it to an SMTP server. More information: https://marlam.de/msmtp.

• Send an email using the default account configured in ~/.msmtprc:

echo "Hello world" | msmtp [email protected]

• Send an email using a specific account configured in ~/.msmtprc:

echo "Hello world" | msmtp --account=account_name [email protected]

• 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=[email protected] [email protected]