Block limit MTA option

Message size MTA options:  (integer)
The  MTA option places an absolute limit on the size, in  MTA blocks, of any message which may be sent by or received with the MTA. Any message exceeding this size will be rejected. By default, the MTA imposes essentially no size limits; (more precisely, the default is the maximum allowed integer, 2&#x2a;&#x2a;31-1). Note also that the   and   channel options can be used to impose limits on a per-channel basis. The size in bytes of an MTA block is specified with the  MTA option.

The  MTA option allows for a similar limit, expressed in terms of lines in a message.

Note that domain LDAP attributes can be used to impose per-domain limits; see the  MTA option (normally specifying the use of the   LDAP attribute) and    MTA option. Or user LDAP attributes can be used to impose per-user limits; see the   MTA option (normally specifying the use of the   LDAP attribute) and the    MTA option.

Or for aliases stored outside of LDAP, the  alias option (or   alias file named parameter in legacy configuration) can be used to impose limits on a per-alias basis.

(Note also that the    channel option, if used, may modify the timing and form of rejections due to exceeding message size constraints.)

See also:
 * Message size MTA options
 * blocklimit Option
 * sourceblocklimit Option
 * block_size MTA Option
 * line_limit MTA Option
 * ldap_domain_attr_blocklimit MTA Option
 * ldap_domain_attr_sourceblocklimit MTA Option
 * ldap_maximum_message_size MTA Option
 * ldap_sourceblocklimit MTA Option
 * alias_blocklimit Option
 * Alias file named parameters
 * acceptalladdresses Option