u_char* buf, size_t buflen
Query the library to find the domain that was actually used to find the DMARC record. Either the From: domain or the organizational domain.
is called after the DMARC record has been fetched and parsed.
- DMARC_PARSE_OKAY -- On success.
- DMARC_PARSE_ERROR_NULL_CTX -- If you passed in a pctx value that was NULL.
- DMARC_PARSE_ERROR_EMPTY -- The buf was NULL or buflen was 0.