On 09/09/2021 10:14, Slavko via mailop wrote:
I use HE IPv6 tunnel, with /48 net, from which i use only one /64 block
yet, thus even all neighbors are under my control. I have even working
PTR for IPv6. I didn't noticed any unusual outbound traffic from my net.
Delivery via IPv4 works without any problems, thus for now i enabled
ipv4_prefer in my MTA.
Last I looked, HE tunnels block TCP port 25 unless explicitly requested
to be unblocked.
Looks to still be the case from their FAQ -
https://ipv6.he.net/certification/faq.php
----
** I can't send email via IPv6. What's wrong? **
Due to a high and persistent amount of abuse, we had to filter SMTP
(tcp/25) connections by default. If you're not providing email service
yourself, you should be able to use port 587 instead to your provider's
email server. If you are providing email services over your tunnel and
need port 25 opened, please send an email to i...@he.net explaining your
situation. We will normally require completion of the Sage level of the
IPv6 certification prior to removing this filter.
----
Hope that helps.
Regards,
Chris Malton
--
Delta V Technologies Limited
03333 402 402 www.deltav-tech.co.uk
Office: Unit J1, Daedalus Park, Daedalus Drive, Lee-on-the-Solent, PO13 9FX
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