[Plugin: Fast Secure Contact Form] Not receiving emails from @gmail.com domains

Hello!

Here’s my test webpage: https://www.valueteam.biz/about-us/contact-us-test/

For some strange reason, I am not receiving any email contact forms if I test with my own private ufoldager(at)gmail.com account.

If I fill out all fields and use my work email ufo(at)valueteam.biz it works just fine.

It seems that only @valueteam.biz goes through. Does anybody know how I can get this to work properly?

https://www.ads-software.com/extend/plugins/si-contact-form/