Basic steps to setup external email clients (Thunderbird, Outlook etc.) to work with Horde.
WARNING! IT cannot help with problems caused by external clients. The official e-mail client is Horde.
Server settings for incoming messages:
type - imap adress - imap.opf.slu.cz port - 993 security - SSL
Server settings for outgoing messages:
adress - smtp.opf.slu.cz port - 465 security - SSL
CRO username and password is required for sending and recieving e-mails.