Posts Tagged »smtp«

Google is talking IPv6 to me.

February 13, 2014 - 3:38 am

We’re getting there!
It has been a while since I started digging into IPv6. My home network is running on IPv6 for a while, but now I’m confident enough to implement it in my productive setup.

My mailserver has now been fully migrated to IPv6 and while doing this I properly implemented TLS (with a CACert signed certificate) including perfect forward secrecy (PFS) and so on.

Here is how servers of major freemail providers are reacting to my new setup.

Provider sending to… receiving from…
IPv6 TLS IPv6 TLS
GMail yes yes yes yes
GMX no yes no yes
web.de no yes no yes
T-Online no yes (no PFS) no yes
Yahoo no broken* (untested) (untested)
live.com/hotmail no no no no
Apple me.com/mac.com no no no no

* Certificate does not match hostname. They are trying to use a wildcard certificate across two levels of subdomains which is forbidden for HTTPS and not explicitely allowed for SMTP.

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