attributetype (1.1.2.1.1.1 NAME 'mailForward'
    DESC 'forward address'
    EQUALITY caseExactIA5Match
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.26)

attributetype (1.1.2.1.1.2 NAME 'mailAlias'
    DESC 'alias address'
    EQUALITY caseExactIA5Match
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.26)

attributetype (1.1.2.1.1.4 NAME 'mailDir'
    DESC 'path of maildir'
    EQUALITY caseExactIA5Match
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 SINGLE-VALUE)
    
attributetype (1.1.2.1.1.7 NAME 'accountActive'
    DESC 'active or not active'
    EQUALITY booleanMatch
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 SINGLE-VALUE)

attributetype (1.1.2.1.1.8 NAME 'domainName'
    DESC 'domain name'
    EQUALITY caseIgnoreIA5Match
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 SINGLE-VALUE)

attributetype (1.1.2.1.1.10 NAME 'transport'
    DESC 'transport'
    EQUALITY caseIgnoreIA5Match
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.26)

attributetype (1.1.2.1.1.11 NAME 'mailDrop'
    DESC 'drop address'
    EQUALITY caseExactIA5Match
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.26)

objectClass (1.1.2.2.1.1 NAME 'mailGroup'
   DESC 'ML Group Account Object'
   SUP inetOrgPerson
   MUST ( accountActive $ domainName $ mailDrop ))

objectClass (1.1.2.2.1.2 NAME 'mailUser'
    DESC 'mail user Object'
    SUP inetOrgPerson
    MUST ( transport $ mailDir $ homeDirectory $ accountActive $ domainName $ userPassword )
    MAY  ( mailForward $ mailAlias ))