Answers:
关于您的混淆点来自何处,迈克尔是正确的。我将继续平时的闷闷不乐,为那些可能因Google搜索而发生的问题回答更大的问题。
TXT
根据DNS标准,多个记录是完全合法的。TXT
实施特定标准的多个记录可能是非法的,但仅在该标准范围内。TXT
共享给定名称的其他记录很好地兼容,因此冲突不太可能发生。当然,这种要求不可能使其成为Internet标准。为了了解差异,让我们看一下SPF标准(RFC 7208)在该主题上要说的内容:
Starting with the set of records that were returned by the lookup,
discard records that do not begin with a version section of exactly
"v=spf1". Note that the version section is terminated by either an
SP character or the end of the record. As an example, a record with
a version section of "v=spf10" does not match and is discarded.
If the resultant record set includes no records, check_host()
produces the "none" result. If the resultant record set includes
more than one record, check_host() produces the "permerror" result.
简而言之,TXT
不符合SPF语法要求的记录将被忽略。仅当多个记录匹配SPF语法时才会发生错误。
(对于可能想知道的人,DMARC语法具有相同的限制。)
如果使用Google Domains
,则在编辑TXT
记录时,该TXT
值旁边会有一个加号(+)符号...单击可添加多个值。