Personally, I don’t think it’s a good idea to rely on Obsidian or similar tools to manage any type of key-value data (email address, phone number, company name, etc…). This tool isn’t great for retrieving that sort of thing it forces you to rely very heavily on templates and standardized formatting which I don’t think it the right path. Instead, I’ve opted to store key-value pairs in a table (with airtable) and link the record id inside the obsidian note that corresponds to that person (that’s it). This way I can easily add/manipulate key-value pairs in bulk and also use other 3rd party systems that act on this data (such as sending an email blast). That’s my two cents