String heloNonNull =
helo == null ? "["
+ mailTransaction.getRemoteInetAddress()
.getHostAddress() + "]" : helo;
SPFResult result =
spf.checkSPF(mailTransaction.getRemoteInetAddress()
.getHostAddress(), fromNonNull, heloNonNull);
logger.debug("SPF check result: {} {}", result.getResult(), result
.getExplanation());
return result;
}