one gmail id trick

Gmail ignores period(.) and any random text written after + in email-address ( before @ ). This helps to use same email address for various purposes.

For example,
Any of the following email addresses will point to your primary address [email protected]

With this trick you can use same email address for work/personal/other category stuff

You can set email id as

[email protected] for work
[email protected] for personal
[email protected] for other category
 
This will help to filter/block incoming email using specified recipient email address.