On 2025-04-09 at 05:53:19 UTC-0400 (Wed, 9 Apr 2025 11:53:19 +0200)
Jack Raats via Postfix-users <ml...@jarasoft.net>
is rumored to have said:
Sorry. I meant ipv4 only, so an ipv6 only server cann't connect with
the mailinglists
An ipv6-only server cannot connect with a very large fraction of mail
systems. It is also still true that some very large mailbox providers
effectively have much stricter spam filtering for mail coming from ipv6
senders.
I am not arguing that those are *good*, merely that they are the current
reality.
Op 09-04-2025 om 08:06 schreef Florian Piekert via Postfix-users:
Hello,
I only see IPv4. Maybe DNS issue on your end?
root@sonne:~# host list.sys4.de
list.sys4.de has address 45.90.5.195
list.sys4.de mail is handled by 10 list.sys4.de.
root@sonne:~# dig list.sys4.de MX
; <<>> DiG 9.20.7-1+ubuntu24.04.1+deb.sury.org+1-Ubuntu <<>>
list.sys4.de MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62732
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL:
2
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: b1825ca341f14e060100000067f60e112e8fbce6c78ba10d (good)
;; QUESTION SECTION:
;list.sys4.de. IN MX
;; ANSWER SECTION:
list.sys4.de. 3589 IN
MX 10 list.sys4.de.
;; ADDITIONAL SECTION:
list.sys4.de. 3379 IN
A 45.90.5.195
root@sonne:~# dig list.sys4.de AAAA
; <<>> DiG 9.20.7-1+ubuntu24.04.1+deb.sury.org+1-Ubuntu <<>>
list.sys4.de AAAA
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38474
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL:
1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: ba83e40ef3737ac40100000067f60e503ae212970160cb6d (good)
;; QUESTION SECTION:
;list.sys4.de. IN AAAA
;; AUTHORITY SECTION:
sys4.de. 3316 IN
SOA ns.sys4.de. hostmaster.sys4.de. 2025040903 3600 3600
604800 3600
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1) (UDP)
;; WHEN: Wed Apr 09 08:06:08 CEST 2025
;; MSG SIZE rcvd: 119
Am 09.04.2025 um 07:57 schrieb Jack Raats via Postfix-users:
My only ipv6 mailserver tries to connect with list.sys4.de which is
ipv6 only???
gr.,
Jack
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--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo@toad.social and many *@billmail.scconsult.com
addresses)
Not Currently Available For Hire
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