use a proper email parser: My example parse all emails out of the text and then print only the email addresses, that start with constant= 
use Email::Address;

my @add = Email::Address->parse(<<'__TXT__');
f834bkg94halUF9deju hHFDUO()NFRS432 DSFadsfg94hHFDUO()N
hfedls74d8oHFx constant=barney@gmail.com alUF9dejuH()NF
UO()NFRS432 DSFadsf4halUF9deju fedls74d8oH sfg94hHFDUOf
f834bkg94halUF9deju hHFDUO()NFRS432 DSFadsfg94hHFDUO()N
hfedls74d8oHFx constant=wilma@aol.com alUF9dejuH()NFui0
UO()NFRS432 DSFadsf4halUF9deju fedls74d8oH sfg94hHFDUOf
__TXT__
for my $add (@add) {
  local $_ = $add->address;
  next unless s/^constant=//;
  print $_, $/;
}

[download]
output: 
barney@gmail.com
wilma@aol.com

[download]
Boris

In reply to Re: grep question using multiple lines by borisz
in thread grep question using multiple lines by bradcathey

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