my contact forms messages never reach my zoho email account, I guess is a spam server issue

my contact forms messages never reach my zoho email account, I guess is a spam server issue

Hello
my zoho email account is charliepro@zoho.com, I have an issue:
the messages from a contact form from my website www.alfa-omega.info never reach my other email account consultas@alfa-omega.info, I assume it is a spam server issue, because that same contact form sent messages to others email accounts without problems. In addition the account consultas@alfa-omega.info  receives messages from every single email account , except for the contact form. What solution would this have? Greetings and thanks in advance