Wietse,
I run the script every five minutes for more than 13 hours to the DNS
server of Cloudflare (2620:fe::fe).
Four times I had some packet drops (about 25%).
I think that cann't explain why postfix is not reachable on ipv6.
Can postscreen drop an ipv6 connection?
Gr.,
Jack
Op 28-04-2024 om 16:20 schreef Wietse Venema via Postfix-users:
Jack Raats via Postfix-users:
In the Netherlands but also in other countries you can use internet.nl
to test your e-mail and webserver.
It test your e-mailserver for ipv6 connectivity, SPF, DMARC and DKIM.
My mailserver scores sometimes 100%, but also sometimes lower because it
cann't connect postfix on ipv6.
In main.cf mynetworks and inet_interfaces has my ipv4 and ipv6 address.
inet_protocols = all.
In the rest of my configs I'm using my ipv4 address.
What is possible wrong in postfix or is it the connection?
To monitor your IPv6 connectivity, you could run a cron job that
runs a script that pings a well-connected IPv6 address:
#!/bin/sh
ping -q -c 10 some-ipv6 | loggger -t check-ping -p daemon.info
and scan the log every day or so.
Wietse
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