On Wed, Apr 09, 2025 at 07:57:57AM +0200, Jack Raats via Postfix-users wrote:
> My only ipv6 mailserver tries to connect with list.sys4.de which is
> ipv6 only???
It is presently IPv4-only.
Apr 06 18:41:03 amnesiac postfix/smtp[968777]: Verified TLS connection
established to list.sys4.de[45.90.5.195]:25: TLSv1.3 with cipher
TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature
RSA-PSS (2048 bits) server-digest SHA256
Apr 07 14:45:58 amnesiac postfix/smtp[1044560]: Verified TLS connection
established to list.sys4.de[45.90.5.195]:25: TLSv1.3 with cipher
TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature
RSA-PSS (2048 bits) server-digest SHA256
Apr 08 23:29:21 amnesiac postfix/smtp[1070022]: Verified TLS connection
established to list.sys4.de[45.90.5.195]:25: TLSv1.3 with cipher
TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature
RSA-PSS (2048 bits) server-digest SHA256
With no IPv6 address in DNS:
$ dig +noall +noedns +ans +auth +add +comment -t aaaa list.sys4.de
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2866
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; AUTHORITY SECTION:
sys4.de. 1130 IN SOA ns.sys4.de.
hostmaster.sys4.de. 2025040903 3600 3600 604800 3600
--
Viktor.
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