attributetype
   ( 1.3.6.1.4.1.42.2.27.2.1.15
      NAME 'rfc822MailMember'
      DESC 'rfc822 mail address of group member(s)'
      EQUALITY caseIgnoreIA5Match
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 
   )
objectclass ( 1.3.6.1.4.1.42.2.27.1.2.5
        NAME 'nisMailAlias'
        SUP top STRUCTURAL
        DESC 'NIS mail alias'
        MUST cn
        MAY rfc822MailMember )