import email
from email.header import Header, decode_header, make_header

m = email.message_from_string("""Subject: =?utf-8?Q?2010_Foundation_Salary_and_Benefits_Report;_Important_Legislative_Efforts?=
Mime-Version: 1.0

Body goes here.
""")

print 'This subject line is broken incorrectly:'
S = m.as_string()
print S

# Convert to a Header object
m['subject'] = make_header(decode_header(m['subject']))

print 'This subject line is broken correctly:'
print m