Zitat von Benny Pedersen <m...@junc.org>:
rignow postfix use best avilble imho according to recipient mx, but this gives not correct ehlo :/
Why do you want a different EHLO when using IPv6/IPv4? Best practice would be to use one hostname which resolves for IPv4 and IPv6 addresses and matching PTR. If you have "dynamic" IPs with PTRs set by your ISP you should not use it for sending mail anyway and non matching EHLO will be your least problem.
Regards Andreas
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