On 3.5.2013, at 12.34, Jakob Hirsch <j...@plonk.de> wrote: > forum, 30.04.2013 16:55: > >> Now i have found the solution. >> It seems to help to ask you. ;) >> >> The solution was to change from >> listen = [::] >> to >> listen = *, [::] >> >> There is no explanation for it - just try and error ... > > This is not dovecot's fault. See here: http://serverfault.com/a/39561 > > In short: In Linux, binding to :: means "bind to both ipv6 and ipv4". > Setting /proc/sys/net/ipv6/bindv6only to 1 changes this behaviour, and > Debian had this by default in some testing versions of squeeze, as was > recently discussed on the asterisk-users list: > http://lists.digium.com/pipermail/asterisk-users/2013-March/278296.html
Software can also specify if they want that functionality or not. In Dovecot v1.0 [::] may have listened also on IPv4, but since v1.1 [::] has only listened on IPv6. So I guess the complaint wasn't really about Dovecot v2.x, but about v1.1+. Hmm. So Debian stable is switching from Dovecot v1.0 -> v2.1? Maybe it would be worth mentioning this somewhere.
