Yes, this service is included with your STRATO account.
If you would like to send encrypted e-mails with your own e-mail program, then select the box, "My server requires an encrypted connection (SSL)". This setting can be found in your e-mail program rules option under "Tools" -> "e-mail settings (account settings)."
The e-mail server names are:
POP3: pop3.strato.com
SMTP: smtp. strato.com
IMAP: imap. strato.com
If your e-mail program requires port information:
• port 110 (POP3)
• Port 995 (POP3/SSL)
• Port 25 (SMTP)
• Port 465 (SMTP / SSL)
• Port 143 (IMAP)
• Port 993 (IMAP / SSL)