Many people are forwarding email from their website Contact Forms to other addresses like @gmail.com. If you are doing this just check that the ‘forwarding’ still works!
You may be aware that over 85% of all email now crossing the internet is SPAM. As a result your own and many ISPs are fighting to keep genuine email flowing by enforcing their own rules to reject potential spam. These rules very across all ISPs and so you need to check their policies to make sure email is getting to you.
A simple test is to send an email to your website address from your own address and see if the ‘forwarding’ works.