Please choose the guideline depending on your mail client.
Desktop
Outlook 2007 : https://cp.runitspace.com/index.php?rp=/knowledgebase/13/Configure-Outlook-2007-IMAP-or-POP-Account.html
Outlook 2010 : https://cp.runitspace.com/index.php?rp=/knowledgebase/14/Configure-Outlook-2010-IMAP-or-POP-Account.html
Outlook 2016 : https://cp.runitspace.com/index.php?rp=/knowledgebase/55/Configure-Outlook-2016-IMAP-or-POP-Account.html
Outlook 2019 : https://cp.runitspace.com/index.php?rp=/knowledgebase/71/Configure-Outlook-2019-IMAP-or-POP-Account.html
eMclient : https://cp.runitspace.com/index.php?rp=/knowledgebase/7/Configure-IMAP-or-POP-for-eM-Client.html
MAC mail : https://cp.runitspace.com/index.php?rp=/knowledgebase/12/Set-up-Mac-mail-with-IMAP.html
Exchange (EWS) : https://cp.runitspace.com/index.php?rp=/knowledgebase/68/Configure-Outlook-using-EWS.html
Smartphone
iPhone/ IPAD : https://cp.runitspace.com/index.php?rp=/knowledgebase/5/Configure-IMAP-on-iPhone-or-iPad.html
Android : https://cp.runitspace.com/index.php?rp=/knowledgebase/53/How-to-configure-IMAP-on-Android.html