On 2021-04-02 21:52, Rob McGee wrote:
On 2021-04-01 11:02, Michael Grimm wrote:
Background of my question:
One of the bigger email providers in Germany (t-online.de = TOL)
started to block my IPv4 address. I do assume that this has to do with
being blocklisted (see
http://www.uceprotect.net/en/rblcheck.php?ipr=135.125.211.209),
although my IP address isn't blacklisted but the subnet it is member
of.
You do wrongly assume this. T-online.de is not using UCEProtect
for blocking mail. Hardly anyone in the world is doing so, save
some over-eager hobbyists who learn how to use a DNSBL and think
they need to add as many DNSBLs as possible.
t-online blocks #metoo
i have just added t-online.de to rpz, no more problem
I checked for my IPv6 address, and it isn't blacklisted. Thus I tried
to bypass TOL's blocking by using IPv6 until I will have been
whitelisted by them (what happened in the meantime). FTR: It wouldn't
have worked because TOL's mailservers are IPv4 only.
But it is good to know that smtp_address_preference might help me with
other ISP blocking my IPv4.
You're much more likely to encounter delivery problems on v6 than
on v4.
freebsd have an ipv6 only kernel, big problems :=)
