regex to validate email with names and delimiter

gistfile1.txt

Regexp.new('\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})(\z|\s<\w+(?:>\z|\s\w+>\z))', true)                                                                                |~                              
Regexp.new('(?:\A|,{1})(?:<{0,1})([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})(?:>{0,1})', true)                                                                             |~                              
Regexp.new('(?:\s<|w+\s)([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})(?:>|,{0,1}\z)', true)                                                                                  |~                              
Regexp.new('(?:^([^<@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})|^(?:\w+\s)+<{1}([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})(?:>{1}$))', true)

Regexp.new('(?:^([^<@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z|^(?:\w+\s)+<{1}([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})(?:>{1}$))', true)