A literary agent reviewed my full manuscript in the spring. She shared it with her team and asked me to revise and resubmit. Six months later, I am just about ready to resubmit it, but she is now with a different agency. The new agency doesn't provide email addresses for individual agents and requires writers to query to a general email address.

What is the proper way to submit a revision to her? I don't want to tweet at her or do anything rude or annoying. Should I send a query (to her attention) to the new agency's 'submissions' email address or use their contact form? Are there any etiquette rules that apply here?