It's valid IF you have configured MX records in DNS
AND you have configured a mail transfer agent (eg Postfix) and some other software properly
AND you have the user configured
If you merely have a website setup, no: xyz@myurl does not work
If you have the first three things configured properly, yes; xyz@myurl will receive mail
August 04, 2020 at 10:32AM
via reddit https://www.reddit.com/r/Wordpress/comments/i3k90d/if_i_have_my_own_domain_is_xyzmyurl_valid_where/g0bvk3k?utm_source=ifttt