Cannot receive any email from the other

Cannot receive any email from the other

Dear sir/madam
I have created a new zoho mail for my job 8 days ago.
ID: 725557042
I can use this zoho mail address to send to other email, but I cannot receive any email from other.
When I use other email to send mail to this zoho mail, it appears this mistake: "hot unreachable".
Please help me to configure.
Hope to hear from you soon,
Thanks and best regards,
Sandy