sendmail-8.12.6+cyrus-imapd-2.0.17: check presence of the cyrus mailbox during establishing SMTP connection

[A Clockwork Orange]

Hello,   sendmail-8.12.6+cyrus-imapd-2.0.17   I'd like sendmail to check presence of the cyrus mailbox during establishing SMTP connection. If the cyrus mailbox doesn't present sendmail drops SMTP connection (doesn't recieve email). What have i to write in sendmail.mc file?     Thanks in advance. Best regards,   ________________________ Leonid,