msmtp

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

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

echo {{"Hello world"}} | msmtp {{to@example.org}}

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

echo {{"Hello world"}} | msmtp --account={{account_name}} {{to@example.org}}

• 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}}