my %where = (
    status => ['Offered','Denied','Cancelled','Conditional Offer'],
    sent_email => { '!=' => [ -and => undef, '0000-00-00' ] },
);

##</code><code>##

use strict; use warnings; use feature 'say';
use Data::Dumper;
use SQL::Abstract;

my %where = (
    status => ['Offered','Denied','Cancelled','Conditional Offer'],
    sent_email => { '!=' => [ -and => undef, '0000-00-00' ] },
);

my $sqla = SQL::Abstract->new;
my ( $sql, @bind ) = $sqla->select(
    'TblRequests',
    'sent_email',
    \%where,
    undef,
);

say $sql;
say Dumper \@bind;

__END__

##</code><code>##

SELECT sent_email FROM TblRequests WHERE ( ( ( sent_email IS NOT NULL AND sent_email != ? ) AND ( status = ? OR status = ? OR status = ? OR status = ? ) ) )
$VAR1 = [
  '0000-00-00',
  'Offered',
  'Denied',
  'Cancelled',
  'Conditional Offer'
];