Interpretation of the local part of an email address is dependent on the conventions and policies implemented in the mail server. For example, case sensitivity may distinguish mailboxes differing only in capitalization of characters of the local-part, although this is not very common. Apart from work, school, or organization addresses, gmail ignores all dots in the local-part for the purposes of determining account identity. This prevents the creation of user accounts your.user.name or yourusername when the account your.username already exists.
The bottom line is that if you have paid money to own a domain then you should, at the least, buy from a domain registrar that offers email forwarding for their accounts (we prefer Namecheap who do include free email forwarding). You can also create a domain email address from the cpanel given to you by your hosting providers—they’ll also provide at least one free email address for your account.
I find it really annoying that people who used to check their email regularly, now leave large intervals between accessing their messages. This seems to be a social media thing where they’re all busy putting up their lunch pictures etc. etc. up for ‘everyone’ to see. Unfortunately this behaviour seems to be spilling over to the less conscientious in their work activities and they seem to be treating digital mail with contempt in some cases. Guess it’s back to paper mail and ‘snail’ delivery – not that that always gets the attention it deserves.