SMTP configuration with AdminPro

Just installed Admin Pro

I use an external SMTP server with authentication in port 465

smtp server says :

“delivery temporarily suspended : conversation with timed out while receiving the initial server greetings”

Is perhaps SMTP in AdminPro intended for use with SMTP-MSA in port 587 , while I need SMTPS protocol in port 465 ??

Is there a way to override the problem ?

Thank you