Email clients’ settings:

Unsecure connections are disabled and obsolete!
Only secure connections are functional.

Username = full email name:
like: [email protected] (for example)

Incoming server:
Use POP3 (store emails on your local device) or IMAP (store emails on remote email server).

POP3Details
Server Hostnames.hiq.onl
Port (not secure, not in use)110
Port (default)995 (SSL)
SSLSSL \ STARTTLS
IMAPDetails
Server Hostnames.hiq.onl
Port (not secure, not in use)143
Port (default)993 (SSL)
SSLSSL \ STARTTLS

Outgoing SMTP server:
SMTPDetails
Server Hostnames.hiq.onl
Port ( server to server ) 25
Port (default)465 (SSL)
Port (optional)587 (STARTTLS)
SSLSSL \ STARTTLS