• Judah MW's avatar
    functions: Added support for leading dots to _idn_encode_decode() · 22635140
    Judah MW authored
    Amavisd supports wildcards by performing decreasingly specific SQL
    lookups:
        9 - lookup for user+foo@sub.example.com
        8 - lookup for user@sub.example.com
        7 - lookup for user+foo
        6 - lookup for user
        5 - lookup for @sub.example.com
        3 - lookup for @.sub.example.com
        2 - lookup for @.example.com
        1 - lookup for @.com
        0 - lookup for @.       (catchall)
        (https://www.ijs.si/software/amavisd/README.lookups.txt)
    
    However idn_to_* returns an empty string if the domain has a leading dot
    which means lookups 0-3 cannot be used.  This is fixed by removing the
    leading dot before encoding or decoding and adding it back just before
    returning the domain.
    22635140