From dc69833a4d8873585d775207498b3638744926ea Mon Sep 17 00:00:00 2001 From: Dennis Baaten Date: Mon, 20 May 2019 16:26:39 +0200 Subject: [PATCH] Updated SPF how to (markdown) --- SPF-how-to.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/SPF-how-to.md b/SPF-how-to.md index 4b7f089..30d6a38 100644 --- a/SPF-how-to.md +++ b/SPF-how-to.md @@ -9,6 +9,8 @@ Our current e-mail infrastructure was originally designed for any mail sending h # Tips and tricks for implementation * The sender address shown to the user ("5322.From header") is not used when authenticating. SPF uses the invisible "5321.From header". Combining SPF with DMARC removes this disadvantage. +* E-mail forwarding is not supported, since the e-mail is often forwarded by another e-mail server. +* SPF does not work between domains that use the same e-mail server. # DNS records (outbound e-mail traffic) SPF for outbound e-mail traffic is limited to publishing an SPF policy as a TXT-record in a domain name's DNS zone. This enables other parties to use SPF for validating the authenticity of e-mail servers sending e-mail on behalf of your domain name.