# msmtp > An SMTP client. > It reads text from `stdin` and sends it to an SMTP server. > More information: . - 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}}`