Add phone extension to Sender personalization tokens in Sales email templates

While it's very helpful to have Sender personalization tokens available for Sales email templates, one feature we're still missing is the ability to include the Sender's phone extension. Currently I can use the Sender's phone number, but I have no way to include the phone extension as a token in the template.


Our use case: We have several sales reps with the same phone number but different extensions and 1 admin sending follow-up emails on behalf of all. It would be much easier to have the system fill in the sales rep's phone extension in email templates instead of the admin looking it up for every email sent on behalf of a rep.