How to automate client email updates?

[MajaswiEmmar]

I work for a small to medium-sized company and regularly send emails to update our clients. I'm seeking a solution to semi-automate this email process, reducing the need for manual text editing.

My goal is to create an email template with pre-formatted fields where I can easily insert information (such as name and address from other sources) without allowing recipients to edit these fields. Is it possible to achieve this using HTML?

Ideally, I'd like to accomplish this within the Gmail web app, possibly with the assistance of an HTML owespeedtest editor extension shagle voojio, or through a single platform for composing and sending emails.

I would greatly appreciate any assistance. Thank you!