如何为许多IP创建SPF记录（SPF超过255个字符） [英] How to create SPF record for many IPs (SPF longer than 255 characters)

问题描述

例如，我有一个具有此ips的数组，并想用我的代码创建一个长的spf记录：

For example I have an array with this ips and want to create with my code an long spf record:

$array_ips = array();
$array_ips[] = "32.16.8.133"; 
$array_ips[] = "32.16.4.247";
$array_ips[] = "35.16.8.184";
$array_ips[] = "32.16.8.127";
$array_ips[] = "32.16.8.134";
$array_ips[] = "32.16.2.154";
$array_ips[] = "32.16.2.153";
$array_ips[] = "32.16.2.150";
$array_ips[] = "39.16.2.190";
$array_ips[] = "32.16.2.128";
$array_ips[] = "32.16.0.128";
$array_ips[] = "32.16.8.187";
$array_ips[] = "43.16.8.185";
$array_ips[] = "32.16.8.192";
$array_ips[] = "32.16.4.249";
$array_ips[] = "52.16.4.252";
$array_ips[] = "32.16.4.238";
$array_ips[] = "32.16.4.232";

$ips = implode(' ip4:', $array_ips);

echo "v=spf1 +a +mx".$ips." -all";

spf记录为：

v=spf1 +a +mx ip4:32.16.8.133 ip4:32.16.4.247 ip4:32.16.8.184 ip4:32.16.8.127 ip4:32.16.8.134 ip4:32.16.2.154 ip4:32.16.2.153 ip4:32.16.2.150 ip4:32.16.2.190 ip4:32.16.2.128 ip4:32.16.0.128 ip4:32.16.8.187 ip4:32.16.8.185 ip4:32.16.8.192 ip4:32.16.4.249 ip4:32.16.4.252 ip4:32.16.4.238 ip4:32.16.4.232 -all 

字符：307

问题是，SPF只能是最大值。 255个字符长。无法在txt dns记录的plesk或cpanel中添加如此长的字符串。我听说，如果有可能这样做 v = spf1 .... first spf第二个字符串... 。

The Problem is, that an SPF only can be max. 255 characters long. No possibility to add such a long string in plesk or cpanel in txt dns record. I have heared that if could be possible to do it like this "v=spf1 .... first" "spf second string...".

但这真的有用吗？
如何在上面的示例中生成它？

But does it realy work? How to do it by generating it in my example above?

推荐答案

您可以将其分解为多个include。

You can break it up into multiple include's..

"v=spf1 mx a include:iprange1.example.com include:iprange2.example.com -all"

然后在每个包含DNS的目录下

Then under each include DNS you'll have

iprange1.example.com = "v=spf1 ip4:32.16.8.133 ... -all"
iprange2.example.com = "v=spf1 ip4:32.16.4.238 ... -all"

这将为您提供更多的空间，因为您可以包括8个include和您的mx以及一个

This will gave you a lot more room because you'll be able to include 8 includes along with your mx and a

然后每个include可以容纳16个ip4地址，这将为您提供大约128个IP地址，而您无法CIDR。

Then each include can hold 16 ip4 addresses that will get your around 128 IP addresses that your can't CIDR.

编辑-iprange1-> iprange2，位于第二个代码段的第二行

Edit - iprange1 --> iprange2 on line 2 of 2nd code snippet

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