diff --git a/docs/content/config/best-practices/spf.md b/docs/content/config/best-practices/spf.md
index e542ea18..1acb4b2f 100644
--- a/docs/content/config/best-practices/spf.md
+++ b/docs/content/config/best-practices/spf.md
@@ -13,7 +13,7 @@ To add a SPF record in your DNS, insert the following line in your DNS zone:
 This enables the _Softfail_ mode for SPF. You could first add this SPF record with a very low TTL.  
 _SoftFail_ is a good setting for getting started and testing, as it lets all email through, with spams tagged as such in the mailbox.
 
-After verification, you _might_ want to change your SPF record to `v=spf1 mx -all` so as to enforce the _HardFail_ policy. See https://www.spf-record.com/syntax for more details about SPF policies.
+After verification, you _might_ want to change your SPF record to `v=spf1 mx -all` so as to enforce the _HardFail_ policy. See http://www.open-spf.org/SPF_Record_Syntax/ for more details about SPF policies.
 
 In any case, increment the SPF record's TTL to its final value.