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IPv4 addresses
1
IPv6 address
Terms
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
or else
ip6:
2a01:4f9:2a:1991::2 / 128
pass
if the sender's IP is between
2a01:4f9:2a:1991::2 and 2a01:4f9:2a:1991::2 (inclusive).
2a01:4f9:2a:1991::2 and 2a01:4f9:2a:1991::2 (inclusive).
Hetzner Online
AS24940
or else
-all
fail
the email's SPF check.
Included records
v=spf1 mx ip6:2a01:4f9:2a:1991::2 -all