General :: Creating Multiple Records (with Queries)

I'm working on a contact database for my company's sales efforts. It tracks interactions with prospective customers and assigns them to employees here. My question is this: For mass contact efforts (such as mailings), is there a way to create mass entries to my "Interactions" table so that no one has to enter a mailout interaction 1000+ times?

Structure of the relevant bits of the database is as follows:

Contacts Table
Interaction Table

Contacts Table is linked with Interaction table via ContactID

Queries are run to narrow Contacts by various criteria (ex.: by the employee they're assigned to).

So if I run a query to get all the contacts assigned to me, and there are 450 of them, and I send a mailout to all of them, and I want to add an interaction to those 450 people, is there an automated way to do this?