On 2022-01-11, Leo Unglaub <l...@unglaub.at> wrote: > i am running OpenBSD 7.0 with all patches applied. Some weeks ago i > noticed a very strange issue with my OpenSMTPd instance. People are > unable to use TLS when connecting via IPv6. This is not just my > observation, some people on misc@ told me so as well.
Works for me. I bet it is MTU related. Try lowering MTU on that interface (you cannot do it separately for IPv4 and IPv6 so it will change both, but that's not likely to be a problem) and get someone who has seen the problems to re-test.
