I can't configure SMTP in EC2 server

Hello! After install Virtualmin in a EC2 server I can receive and send emails from Usermin.

From email's client (Thunderbird), I can receive (IMAP) but I can't send (SMTP) emails. Can anybody help me?

Notes:

• The user in Virtualmin > 'Edit Users' > 'IMAP / POP3 / FTP login' is 'info.example'
• I opened SMTP ports (25/465) from Amazon console. How can I check that they are open?

Incoming server (working):

• Server Type: IMAP
• Server Name: mx.example.org
• Port: 143
• Connection Security: None
• Authentication Method: Password, transmitted insecurely
• User Name: info.example

I tried the following outgoing server configurations:

• Server Type: SMTP
• Server Name: mx.example.org
• Port: 25
• Connection Security: None
• Authentication Method: Password, transmitted insecurely
• User Name: info.example

Changing 'Server Type':

• Server Type: SMTP
• Server Name: example.org
• Port: 25
• Connection Security: None
• Authentication Method: Password, transmitted insecurely
• User Name: info.example

Changing 'Server Type':

• Server Type: SMTP
• Server Name: smtp.example.org
• Port: 25
• Connection Security: None
• Authentication Method: Password, transmitted insecurely
• User Name: info.example

Changing 'User Name':

• Server Type: SMTP
• Server Name: mx.example.org
• Port: 25
• Connection Security: None
• Authentication Method: Password, transmitted insecurely
• User Name: info@example.org

Changing 'Connection Security':

• Server Type: SMTP
• Server Name: mx.example.org
• Port: 465
• Connection Security: SSL/TLS
• Authentication Method: Normal password
• User Name: info.example

Regards.