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#1 Created at ... [Delete] [Delete and Lock User] 
partern = r'^(<[-\w\s_\.]+>)?\s*([\d\w_\.-]+)@([\w\d_\.-]+)$'
partern = re.compile(partern)
mail = '<Tom Paris> tom@voyager.org'

print(partern.match(mail),groups())

测试可以匹配到 

<Tom Paris> tom@voyager.org
<Tom.Paris> tom@voyager.org
<Tom-Paris> tom@voyager.org
tom@voyager.com.cn
bill-gates@test-test.com.cn.net
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