TRANSACTION LIMIT RCPT TO

TCP/IP-channel-specific options: TRANSACTION_LIMIT_RCPT_TO (0 or 1)
This SMTP/LMTP server option affects the MTA&#x27;s behavior once    has been exceeded. The default is 0, meaning that once   has been exceeded,  then the MTA will reject subsequent transactions (during that same  session) at the MAIL FROM: command. If set to 1, the subsequent transactions will instead be rejected at the RCPT TO: command. In either case, the rejection will be done via an error: 451 4.5.3 No more transactions allowed

See also:
 * ALLOW_TRANSACTIONS_PER_SESSION
 * TCPIP-channel-specific options