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authorMarcin Chrzanowski <m@m-chrzan.xyz>2024-01-17 11:48:25 +0100
committerMarcin Chrzanowski <m@m-chrzan.xyz>2024-01-17 11:48:25 +0100
commite25148c733753df376ab807c24b6cfd45888f88d (patch)
treed7ae3522cf7730d1e39a0d5bf3dcd210396e3e74 /content
parent8c6d8cd9de9b3ec3798bdaa0666be2a8efd48721 (diff)
Add ip SPF mechanisms to comply with gmail's policies
Diffstat (limited to 'content')
-rw-r--r--content/mail/validate.md15
1 files changed, 14 insertions, 1 deletions
diff --git a/content/mail/validate.md b/content/mail/validate.md
index fbdba50..f443768 100644
--- a/content/mail/validate.md
+++ b/content/mail/validate.md
@@ -209,9 +209,22 @@ an email-authentication standard used to prevent spammers from sending messages
that appear to come from a spoofed domain.
cat /etc/mailname
- echo "v=spf1 mx a:mail.$(cat /etc/mailname) -all"
+ IP4=<your VPS's IPv4 address>
+ IP6=<your VPS's IPv6 address>
+ echo "v=spf1 mx a:mail.$(cat /etc/mailname) ip4:$IP4 ip6:$IP6 -all"
+
+**Note**: previous versions of this guide didn't ask you to specify the `ip4`
+and `ip6` mechanisms. If you don't include them, some email hosts (most
+notoriously gmail) will not accept mail from your server.
+
+The `IP4` and `IP6` values should be the same as what you set your [PTR
+records](../rdns.html) to.
The output of `cat /etc/mailname` is the Host field. The output of the second command is the TXT value.
Again, you can check [that site](https://appmaildev.com/en/spf)
to make sure your DKIM, DMARC, and SPF entries are valid. That's it!
+
+## Contribution
+
+- SPF mechanisms updated by Martin Chrzanowski \-- [website](https://m-chrzan.xyz), [donate](https://m-chrzan.xyz/donate.html)