I've been receiving the Boosey & Hawkes email newsletter for a few years now, and it finally dawned on me that others might also be interested. I made inquiries and found out how you subscribe:
1. Send email to email@example.com with the subject line eNewsletter Subscribe.
2. Include this information in the body of the email:
Title (Trombonist, Student, Professer, Artistic Administrator, Curious
I don't know how negotiable all of that information is, but you can ask. The newsletter always contains interesting articles about B&H composers and new music in general.