dig +short TXT   mail._domainkey.example.com.
"v=DKIM1;"
"k=rsa;"
"p=MIGfMA0GCSqGblahblahblahDCBiQKBgQC55gymo9hvcdVpZIXhsO2Gn2hjJdcngKfkab7sDoYV6lvZYe/4euT+JbMk2PUMeWyGuJdkhv+iGzO8CMwjWO9PMOfMZGC8zd4ID3q7dP7QplV93j4i20tMk9fHTQYi0KFI8CB6sDhIhqKgEaJi6PL9DRQlahV00n6DqeWPSzJQNQIDAQAB;"

/usr/sbin/opendkim -V
opendkim: OpenDKIM Filter v2.9.1
    Compiled with OpenSSL 1.0.1f 6 Jan 2014
    SMFI_VERSION 0x1000001
    libmilter version 1.0.1
    Supported signing algorithms:
        rsa-sha1
        rsa-sha256
    Supported canonicalization algorithms:
        relaxed
        simple
    Active code options:
        QUERY_CACHE
        USE_DB
        USE_LDAP
        USE_LUA
        USE_ODBX
        USE_UNBOUND
        _FFR_ATPS
        _FFR_RBL
        _FFR_REPLACE_RULES
        _FFR_STATS
        _FFR_VBR
    libopendkim 2.9.1: atps query_cache



/usr/sbin/amavisd-new -V
amavisd-new-2.7.1 (20120429)