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Useless (?g) - use /g modifier in regex; marked by <-- HERE in m/(?mg +<-- HERE x)^(From\s.*\d:\d\d:\d\d\s\d{4}| From\s.*\d:\d\d:\d\d\s\d{4}\s[+-]\d{ +4}| From\s.*\d:\d\d\s.*\w{2,3}\s\d{4})$/ + at ./grepmail.orig line 163.
diff grepmail.orig grepmail 161c161 < while($READ_BUFFER =~ m/(?mgx)^(From\s.*\d:\d\d:\d\d\s\d{4}| --- > while($READ_BUFFER =~ m/(?mx)^(From\s.*\d:\d\d:\d\d\s\d{4}|