Hello there,
I think there’s an issue with the SPF record on forum.k9mail.app
. My mailserver doesn’t like it and is sending forum notifications to Junk by default.
2025-03-27 15:57:33 #787(rspamd_proxy) <A8DA19>; spf; parse_spf_a: unresolvable A element for amxip4:109.230.236.132ip6:2a05:bec0:1:3::42-all: forum.k9mail.app
(FWIW this is rspamd v3.11.1 as shipped and configured by docker-mailserver v15.0.2.)
Here’s the record itself, as supplied by one of the authoritative nameservers:
$ dig +short @kia.ns.cloudflare.com. forum.k9mail.app TXT
"v=spf1" "a" "mx" "ip4:109.230.236.132" "ip6:2a05:bec0:1:3::42" "-all"
According to RFC 7208 section 3.3:
If a published record contains multiple character-strings, then the record MUST be treated as if those strings are concatenated together without adding spaces.
So that would be read as:
v=spf1amxip4:109.230.236.132ip6:2a05:bec0:1:3::42-all
Which I wouldn’t expect to work.
It would be helpful if the person responsible for the k9mail.app
domain could fix this. What would be a good way to reach them?
Thanks