Browse to Account Settings >> Click ‘Add new account’.
In the Account Type, select ‘POP’.
Enter the values Account Description, Preferred Display name and Email Address. Click Continue
Specify the following details in the Incoming Mail Server Page and click 'Contiue'.
Incoming Mail Server: pop.zoho.com
User Name: Zoho Email Address
Password: Zoho Password
Specify the following details in the Outgoing Mail Server Page and click 'Contiue'.Outgoing Mail Server: smtp.zoho.com
User Name : Zoho Email Address
Password : Zoho Password
The checkbox 'Use authentication' should be checked.
Click Finish to complete the 'Add Account'.
Try to send a mail from an external Mail Account and vice-versa to test the settings.
Note:
Sometimes there might be an 'SMTP' error as Mac Mail checks connects SMTP only in the port 587 whereas Zoho Mail uses port 465 for sending mail. In such a case, follow the steps given below as a to configure your Zoho account to work in Mac Mail.
There will be an error after you set up the SMTP details saying 'smtp.zoho.com' is not responding. Click Continue in the page and finish the account setup.
Open Account settings
If this is your only account set up in Mac, Click Settings icon to configure Account settings.
If you have multiple POP accounts configured, select the POP account from Inbox section, right click and select 'Edit Account'.
Click Advanced to configure Outgoing Server.
Modify the Server port to 465 from 587 and click OK.
Try to send a mail from an external Mail Account and vice-versa to test the settings.
