How do you manage cold reachouts for a young indie project?

As we're starting to sell our product, the first strategy is targeted cold reachout.
Assuming we already figured out how to find our potential buyers (and their emails), how do you guys manage the actual email sequences?

I'm looking for a free solution (or VERY cheap), that will hopefully support -

1. Email tracking (opens, clicks)
2. Email sequences (to automated all those followups)
3. Email templates (variable fields for FIRST_NAME, COMPANY_NAME, etc.)
4. Bulk operations (I want to send emails to dozens of people at a time)

Any suggestions? the tools I've seen so far were all sub-par / expensive.