Pick Up the Phone
Should you use email or phone for that topic?
If you're asking this question, chances are you should pick up the phone and engage.
Remember in email:
--your tone and intention can be misinterpreted
--you can't gauge the reader's reaction
--back and forth Q&A will be a drain and likely confusing
--your note could be forwarded to others
When in doubt, request time to speak live. You'll never regret the human approach.