How do you keep track of your personal email templates?

When writing a new email, I often find myself opening my "Sent" folder looking for a similar type of email that I have already written. This is especially the case for standard emails such as sending a document for review to my boss, requesting work from home, scheduling a meeting and so on.

Having a single database with these email templates would be a time saver because, instead of rewriting all new emails from scratch, I could reuse my past emails and just slightly adapt them to the new circumstances. Is there any tool or strategy that you use to keep a list of personal email templates for later reuse?

The following features would be useful in such a tool:

- be independent of any specific web email client because I routinely use multiple web clients,

- be able to tag templates, such as in https://www.starterstory.com/how-to-say-no,

- offer quick search by tag and body text,

- if possible, can also search by date sent and recipient, as that is how I frequently manage to find the right email among all the ones I sent because it is easier to remember a time and a person than the exact wording used in an email.