From MIME::Lite’s documentation: Giving VALUE as an arrayref will cause all those values to be added. This is only useful for special multiple-valued fields like "Received"

So, try–

   To => \@email_addresses,
   # or list them explicitly in an anonymous array-
   To => [ 'email1@doma.in', 'email2@doma.in' ],
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And along with what tobyink pointed out I’d missed, Bcc, can be swapped for the To. However, mass BCCing tends to be interpreted, quite rightly, as spam and filtered out. I hope we’re not helping you send spam. :|

no am not using it for spam, i want to be able to mail all my users in my database

its still showing same thing brings all recipients

here is how the delivery looks like

To: email1@gmail.com, email2@gmail.com, email3@gmail.com
Reply | Reply to all | Forward | Print | Delete | Show original
how are u
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here is my code

my @email_addresses = ('email2@gmail.com', 'email2@gmail.com', 'email3
+@gmail.com');
  
$from = 'support@mydomain';
$subject = "hello users";
$message = "how are u";

$msg = MIME::Lite->new(
                 From     => $from,
                 To       => \@email_addresses,
                 Subject  => $subject,
                 Data     => $message
                 );
                 
$msg->send;
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Great. tobyink’s approach is right for what you want. Mail each separately.

The answer above shows how to do it if you're happy for each recipient to see the full list of recipients in their mail headers (and be able to hit "Reply to All" in their email client).

If not, just loop through your array of addresses.

for my $address (@addresses) {
  my $msg = MIME::Lite->new(
    To => $address,
    ...,
  );
  ...;  # actually send the message or something
}
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thanks guys for helpful response