I tried the Loop as you said, but i'm recieving the following error. Single recipient is still working with previous method. But with the loop even the single recipient is not working.

Error sending email: Email::Send::Gmail: error sending 'to' at /Library/Perl/5.10.0/Email/Send.pm line 252

at /Library/Perl/5.10.0/Email/Send.pm line 252

I tried it as follows :

  #!/usr/bin/perl
  
  use warnings;
  use LWP::Simple;
  use Email::Send;
  use Email::Send::Gmail;
  use Email::MIME::Creator;
  use IO::All;
  
  my $basefolder = "/Users/Abc/Desktop/";
  my $from         = "abc1\@gmail.com";
  my $subject     = "DAILY SOCIAL MEDIA SEARCH";
  for my $to ( 'abc3\@gmail.com', 'abc2\@hotmail.com'){
      my @parts = (
             Email::MIME->create(
             attributes => {
             filename         =>"M-B.csv",
             content_type    =>"application/csv",
              disposition     =>"attachment",
              Name            =>$basefolder . "M-B.csv",
              },
              body => io( $basefolder . "M-B.csv" )->all,
      ),      
  );
  
   my $email = Email::MIME->create(
      header => [
          From    => $from,
          To      => $to,
          Subject => $subject,
      ],
      parts => [@parts]            
  );
  
  
  
my $sender = Email::Send->new(
      {   
                        mailer      => 'Gmail',
      mailer_args => [
                      username => 'abc1\@gmail.com',
                      password => '1234qwerty',
                       ]
      }
  );
  eval { $sender->send($email) };
  die "Error sending email: $@" if $@;
  
}
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Something must be wrong with my for loop application. Kindly point it out.