I made a new account at zoho and mail to an excisting domain klasseakoestiek.nl

Added Zoho to MX Records.

I am able to send mail from Zoho platform (from mailadres  @klasseakoestiek.nl).

but strangely sometimes I can receive email from my gmail account or my work acount. Most of the time i can't receive mail, from other collega accounts/mailadresses never recieved mail.

Hope you have a solution

With kind regards