tuna and SMTP
Step 1. Download the client
Инструкция доступна на странице.
Step 2. Run SMTP server
Step 3. Run tuna
SMTP server uses port 25 by default, or 465 for secure connection:
tuna tcp 25
As a result of running the command, the connection address will be displayed (for example, ru.tuna.am:12345), which can now be used to connect to the SMTP server.