email

SMTP - Simple Mail Transfer Protocol
SMTP or Simple Mail Transfer Protocol allows you to send emails from an email application through a specific server. For example, if you want to use your Zoho Mail account to send email through another email client, you will need to configure the settings in that client with Zoho's SMTP information.

SMTP Configuration settings for Zoho Mail - SSL
Outgoing Server Name: smtp.zoho.eu
Port: 465
Security Type: SSL 

 IMAP - An introduction
IMAP and POP3 are protocols that allow you to download email messages from your Zoho Mail server and access them with desktop email clients like Outlook/ Mac Mail and/or mobile email clients iPhone/ Android email apps. Zoho Mail can be configured on any standard IMAP email client using the IMAP and SMTP Server Settings.

IMAP is more recent than POP and allows a two-way synchronization between the email clients and your Zoho Mail account. IMAP is recommended when you want to access the same account from multiple email clients. 

Enable POP Access
You need to enable POP access of the Zoho Mail account, to start accessing the account in other POP clients. You can enable POP access for all emails from the beginning or from that particular day.