On Tuesday 31 August 2010 11:17:25 Arthur Titeica wrote: > > In: EHLO [zzzz:zzzz:z:z:zzzz:zzzz:fe79:ccd9]
> Could someone share some thought about it? Not seen this myself, and only starting to learn IPv6 but.... EHLO tag not conforming with RFC2821 4.1.3 should start [IPV6 for an IPv6 tag so Postfix is probably doing the right thing unless the standard has been relaxed subsequently. Without the IPv6 prefix Postfix probably expects an IPv4 address, and what you have doesn't look like a valid IPv4 address to me (you seem to have obfuscated the relevant section). You'd have to check the code to see if my supposition is correct, or wait for Wietse or someone more knowledgable. I'd check the status of the email client IPv6 support, and if it is current, post back here without obfuscating (you might need to reproduce it with test data for privacy reasons), and mail client name version so we know what to look out for when the time comes. Simon