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: > > ESMTP_PREFER_IPV6_MX=1 is the default setting in the courierd configuration > file. As installed, by default, it should be there. > > However if it was manually removed, or changed to ESMTP_PREFER_IPV6_MX=0, > then Courier will try IPv4 addresses first. It's up to you how you want it > set. Just note that in the event of a complete connection failure the last > attempted IP address, IPv4 or IPv6, will have its error logged. > > And, of course, this selects your preference for IPv6 versus IPv4 mail > servers, when both are available. > One interesting thing. We've established I have no ESMTP_PREFER_IPV6_MX line in my config, and that ipout is a single ipv4 address, and I have no ip6out. The server is still sending mail via IPv6 to places like Gmail. So it seems it is "preferring" IPv6, but since the ipout is only IPv4 is this correct? Should it be not using IPv6 at all? Or is the issue that with NO ip6out it still uses the first IPv6 address it finds for sending? -- 73 Joe Laffey _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users