Hi Starrynite,
I really like that you've thought ahead and determined some boundaries you're comfortable with (e-mail vs. in-person or over the phone). It's easier to deal with whatever comes your way when you've reflected on what could happen and how you'll react.
What would happen if your sister doesn't respond? What will you do if she wants to meet in person rather than stick to e-mail communication?
I think I'm scared...of what I'm not sure...it was just SO stressful having her in my life.
I get why you'd want some space to protect yourself and your daughter. Keep us posted on how you're doing.