Answer:
Please use the following settings:
IMAP Server: sslmail.lota.net
Security type: SSL (port 993) or Security type: None (port 143)
SMTP Server: sslmail.lota.net
Security type: SSL (port 465)
Besides, you may also use webmail for iPhone or Android Phone at this link.
https://sslmail.lota.net/webmail/pda