How to resolve invalid mailbox syntax?
I am working in the back office of WP and getting an error message on the contact form for my WP website that will set the method of receiving emails from potential customers. In the From field it says "Invalid mailbox syntax is used". I have tried several variations and read the instructions in the 'How to Resolve' link with no success e.g. <[your-email]>. Any recommendations would be welcomed. Thanks.