Unable to receive emails from 3 senders

Hello! Hope you can help. I have not been receiving emails on my gmail account from 3 senders. These emails are not ending up in my spam or junk files. I have no idea what to do. This has been going on for months. Hope you can help. I can share the email addresses of the senders if you eed these.

Thank you so much for your help!

Could you please share further details on the form that you are using?

Have you configured your email in the autoresponder email?

Looking forward to further details.

Thanks.