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Updated SPF how to (markdown)

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Dennis Baaten 2019-06-05 20:17:12 +02:00
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SPF-how-to.md
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@ -11,6 +11,7 @@ Our current e-mail infrastructure was originally designed for any mail sending h
* The sender address shown to the user ("RFC5322.From") is not used when authenticating. SPF uses the invisible "RFC5321.MailFrom" header. Combining SPF with DMARC removes this disadvantage. * The sender address shown to the user ("RFC5322.From") is not used when authenticating. SPF uses the invisible "RFC5321.MailFrom" 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. * 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. * SPF does not work between domains that use the same e-mail server.
* Parked domains should be explicitly configured to not use e-mail. For SPF this is done with an empty policy and a hard fail: "v=spf1 –all".
# Outbound e-mail traffic (DNS records) # Outbound e-mail traffic (DNS records)
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. 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.