Re: IPv6 recap
Joe Laffey <[email protected]>
| Newsgroups | gmane.mail.imap.courier.general |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 5 Apr 2024, Sam Varshavchik wrote: > > No, that should not be necessary. > > Double-check that the ipv4 address, for this MX, is actually reachable. > > If there are multiple IP addresses, either IPv4 or IPv6, each one is tried. > If a connection to one of them fails for any reason the next one should be > tried. After the connection to an IPv6 address fails Courier should then try > the IPv4 address. > > Now, if both of the IP addresses are unreachable, and the IPv4 address was > tried first, the logged error would be the error that was logged from the > last connection attempt, and if it was the IPv6 one then you'll just see that > error. > > I think that's what's happening in your case. OK. I think that must explain it. Because it turns out there was also an ipv4 connectiity issue where some connections failed, including gmail. And that was when we were having the problem. Anyway, all good now, as I setup forward and reverse dns for the ipv6, which is the better solution anyway. Thanks. -- 73 Joe Laffey _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users