smtpd_recipient_restrictions

[Roman Gelfand]

For the outgoing emails, why is the configuration below not enough to:
1. Block   +a...@domain.com
2. Allow all other emails

main.cf

smtpd_recipient_restrictions =
            check_recipient_access pcre:/etc/postfix/recipient_access.pcre


/etc/postfix/recipient_access.pcre

/\+(,*)/        reject